They include variables for the time, the date, the Windows folder, and other settings. I'm trying to echo out a Custom Global Var called "my_code" in a. Symantec helps consumers and organizations secure and manage their information-driven world. Note that "-n" given to the echo command causes it to keep the cursor on the same line; i. Environment Variables, according to a better definition on Wikipedia, are a set of dynamic named values that can affect the way running processes will behave on a computer. DOS Command UNIX or Bash Command Action DIR ls -l (or use ls -lF)(-a all files) (df -k Space remaining on filesystem) List directory contents DIR *. exe, each item is displayed with a newline character. I discovered the following tech-recipe while working on a some old dos batch files. exe) uses the value of this environment variable to determine which extensions to look for and in what order. For that reason referencing the value of a variable with %variable% or with !variable! is not necessary when the variable name consists only of word characters (0-9A-Za-z_) with first character not being a digit which is especially helpful within a command block starting with (and ending with a matching ). This is good but I also want to see this variable with the dos set command. Single command output to a variable. PowerShell uses the @ character to create arrays or hash tables. So there's your floating variable Please mark as an answer if this resolves your questions. On this page I will show you how to view, and how to change the Path variable using PowerShell commands. exe and add its file path to the "AutoRun" key in either. Tienes una variable llamada v1 y asi vn veces, lo que necesito es cambiar cambir a traves de un contador el ultimo valor de la variable v1vn veces a traves de un bucle. Replace a string using other existing variables To replace one substring with another using details in a variable then you need to turn on delayed expansion and use the variation below. On Mac OS or Linux, they are separated by colons. In this tutorial we will look how to list, get and set Windows operating system environment variables in details. Using the simple batch file. The following code will show if a variable MyVar was defined or not: IF DEFINED MyVar (ECHO MyVar IS defined) ELSE (ECHO MyVar is NOT defined) The following code, which works in batch files for all MS-DOS, Windows and OS/2 versions, uses an alternative way to show if a variable is defined or not:. You basically want to redirect nothing into a new text file. Here is an example of a property expression that you might like to use that doesn't work the way you might think it would: PS> Calc. To enable command line invocation of compiler program csc. And also we are aware of the SET command and its flags to perform arithmetic calculations and take the inputs from the user. The variable=`execute` is the same as variable=$(execute) and relies on standard output. How to Echo a Computer's IP Adress in a Batch File July 18th, 2012 This is going to just be a quick post but hopefully there's enough detail to get you going. exe aliases, codepage. BAT at boot time or from batch command used to configure DOS session which is opened under Windows. What are the best devices to use with Amazon Echo? UNANSWERED. Now, I can echo environment variables and run if-clauses based on them. exe environment is to create some kind of rc-script (like ~/. ***Note: Don't use any space before and after the equal sign when using the above commands. EXE files are looked for, not. The for loop and if command use parentheses to group several statements. This example checks for the existence of the environment variable "VARIABLE. To view a list of system variables (and possibly defined user variables), run the set command at the command prompt. This is the way used below to find string in a string. Read Registry value into a batch variable 2019-03-10 Udar Gromov Office and Browsers 4 Before I forget, let me share with you a fantastic way to read values from Registry into a batch file variable. Home / Basics of writing DOS. That is only used by the shell. This is very useful if you are creating a log file, or any file that shou Print Date/Time in DOS Batch File - DOS Batch - Snipplr Social Snippet Repository. But what if I want to use an environment variable in Windows PowerShell?. Can somebody help me please. In the prompt you can now specify the name of your variable as well the value. SET aval=welcome to ms-dos ECHO %aval:come=% About aval is variable name. bon mais sous DOS je suis un peu dans la merde alors voila comment je fais dans. You can specify the values on the command line or pipe them to the. The only way I have been able to echo the special characters is to put them in quotes which will also echo the quotes. The Echo method outputs text to either a message box or the command console window. Symantec helps consumers and organizations secure and manage their information-driven world. Or, you can just type in. cecho is an enhanced ECHO command line utility with color support, inspired by the CTEXT utility by Dennis Bareis. NET Framework, add this to the end of your PATH environment variable. Example @echo off set message=Hello World echo %message%. The use of ad-blocking software hurts the site. If you can see what I'm attempting, I'm trying to assign a variable to a command and be able to print that variable later. Complete List of Environment Variables in Windows 10 Environment variables are a set of dynamic named values that can affect the way running processes will behave on a computer. txt cat c est comme type sous dos. The above script is useful, but it has hard-coded paths. None of the samples seem to work. Winset lets you set environment variables globally (they persist once your batch file ends). The Echo method outputs text to either a message box or the command console window. If you reference the value of another variable in value (e. -rwx----- 1 jzb jzb 21 2010-02-01 03:08 echo The first column of rights, rwx, shows that the owner of the file (jzb) has read, write, and execute permissions. This tutorial describes a simple. This assigns the string "Hello World" to the variable MY_MESSAGE then echoes out the value of the variable. $ x=10 echo its value:. In the video we make a calculator. The key-value pairs are listed in the map variable separated by semicolon. Echo : -n vs c. Some important points to remember about variables in bash scripting. The most used environment variable in Windows is probably the PATH variable. 1 Setting Variables Values of shell variable are all character-based: A value is formally defined to be a list of zero or more elements, and an element is formally defined to be a character string. Read Registry value into a batch variable 2019-03-10 Udar Gromov Office and Browsers 4 Before I forget, let me share with you a fantastic way to read values from Registry into a batch file variable. In my opinion, FOR is the single most powerful command in DOS, and one of the least used. Or you can use the %HOMEPATH% variable to access the current user default folders location — where the operating system stores the folders for Desktop, Documents, Downloads, OneDrive, etc. TSEnvironment). Taking User Input at DOS Prompt It is a very simple way to get the user input at the DOS prompt. Also its pretty cool! Making a game with this script is not that difficult, all it takes is a little time and creativity. This is an essentially trivial question, but anyway: several operating systems have a command to display a specified text string on the terminal, or standard out, or whatever (depends on system to. The command-line ECHO is most useful when you are learning how to use advanced features. Stupid DOS Tricks. The SQL*Plus script does not contain an exit-statement. One of the most common storage for some generic information like Username, operating system path etc. The example shows how to return the first 4 characters of a string. If the statement is not true, that is, the VARIABLE variable does exist, program control skips to the next line of the batch file and continues. value is the value which needs to be set against the variable. Actually, how do I 'output' from a batch job to a variable? Like Rick replied, but I don't see the 'capture from job output' tab to use, thus I'm checking whether I can just do an echo in my batch job and have the batch file path assigned straight to the variable value. Dynamic environment variables (also named internal variables or system information variables under DOS) are pseudo-environment variables supported by CMD when command-line extensions are enabled, and they expand to various discrete values whenever queried, that is, their values can change when queried multiple times even within the same command. Concatenating two string variables in a bash shell script. To process our data/information, data must be kept in computers RAM memory. It tries to dump the outputs of echo statements both on the command prompt window as well as to a file named newline. Click the "Advanced" tab. SET lets us set the value for a variable, and delete a variable. To display such strings properly, you should use print-r instead of echo. Show Current Working Folder or Directory Full Path in Batch Command Script Posted: January 5, 2009 / Under: Operating Systems / By: My Digital Life Editorial Team When executing a batch command script (in. METHOD 1 (uses 4DOS or 4NT) Under 4DOS, getting data into environment variables is simple. C:\Users\tisc> set dow DoW=0 dow = powershell (get-date). Environment variables are typically named in uppercase, with words joined with underscore (_), e. What do they do? A tutorial on the internet said to add a PATH variable, but. This is very useful when we take backup of files with previous date name. In this case, the colon is not interpreted as a label marker, but as some kind of string manipulation command. Variables scoped per workspace folder. Assign command output to variable in dos. List files and size List directory/sub-directory contents recursively. bon mais sous DOS je suis un peu dans la merde alors voila comment je fais dans. How to Echo a Computer's IP Adress in a Batch File July 18th, 2012 This is going to just be a quick post but hopefully there's enough detail to get you going. ***Note: Don't use any space before and after the equal sign when using the above commands. While the ECHO command is intended primarily for use within batch files, it can be used within DOS. Useful for testing command line arguments. ne suite 101 albuquerque, nm 87111 505 - 332 - 5700 www. Al tratarse de variables no es necesario colocar las comillas. The problem is that, the batch file output is: "Echo is ON". Now, I can echo environment variables and run if-clauses based on them. This batch file contains several examples of how to save the date/time to variables in a batch file. The simplest way to create a new file in MS-DOS is with the redirect command. rsh -n cruncher echo ls \* rsh -n cruncher echo 'ls *' If you want to do file redirection on a remote machine, echo isn't sufficient. Every time I get to that part though, it tells me Echo is off. In VSTS the public variables can be defined in the Variables tab or in the running process. * Efficient use of UMB memory (The DOS kernel and COMMAND. Variable Substitution. Assign command output to variable in dos. ma variable NOM est égal au resultat de la commande cat toto. One of the most common storage for some generic information like Username, operating system path etc. Create a new bash file with a name, ‘echo_example. exe is invoked. To check if messages are allowed or not, use the who command with -T option. No; only one of these may be used. Embedded newlines are not deleted, but they may be removed during word splitting. Variable assignment command prefix It is possible to export a variable just for the duration of a single command using the syntax: var=value command args (10) Preset Shell Variables. The value of the variables are neither readable nor editable in the app after they are set. Symantec helps consumers and organizations secure and manage their information-driven world. The set command is often used in the Autoexec. The PATH is the system variable that your operating system uses to locate needed executables from the command line or Terminal window. the message to echo. The following output will be displayed in the command prompt. Bash functions, unlike functions in most programming languages do not allow you to return a value to the caller. The name of a variable is a placeholder for its value, the data it holds. Variables A variable is a simple way to refer to a chunk of data in memory that can be modified. cecho is an enhanced ECHO command line utility with color support, inspired by the CTEXT utility by Dennis Bareis. You need to use the SET command with a variable name for this purpose. ECHO Usage: LEAPYEAR [ year ] ECHO. Click the "Environment Variable" button. Below is a sample batch script which gets current date and time. If no last name was entered, the %2 would print nothing. Windows batch files - date and time formatting:. dayofweek But when I try to get it I don't get the string as I wanted. In general, use "Setup Env. Syntax: %:=% This above statement will return replace string. Scroll down the "System variables" list to the "Path" variable. com Scripting Essentials: A Guide to Using VBScript in SecureCRT. 4DOS is a commmand interpreter (shell) replacement for COMMAND. List of Windows and DOS Command Prompt Environment Variables Posted: January 17, 2009 / Under: Operating Systems / By: My Digital Life Editorial Team Windows and DOS (Command Prompt) have several environment variables which provides a set of dynamic values that points to important system locations or settings. Most of the popular commands which are all frequently used in DOS command, and also more techniques to write batch dos commands file. For anyone who has worked with DOS’s bat files, it’s almost the same concept. getstatusoutput function but on NT, DOS systems the returned status is actually correct (though, the returned status values may be different by a factor). Today's Tip… Getting environment variables in Windows has always been easy. Variables A variable is a simple way to refer to a chunk of data in memory that can be modified. " If VARIABLE does not exist, the statement is true and control of the batch file jumps to the MODULE section. bon mais sous DOS je suis un peu dans la merde alors voila comment je fais dans. Certain built-in variables change the shell in ways that make your life a little easier, and you can define other variables to suit your own purposes. Once this file is created, open the Windows Registry Editor regedit. Using echo each variable written will have CRLF appended, this may be undesirable, if this is a problem use the following solution it uses Set /P: SET /P ;variable=[promptString] The /P switch allows you to set the value of a variable to a line of input entered by the user. Can somebody help me please. Or you can use the %HOMEPATH% variable to access the current user default folders location — where the operating system stores the folders for Desktop, Documents, Downloads, OneDrive, etc. Explain the purpose and function of the. If it is zero, the script prints the message, and the script is terminated. exe of the Microsoft. In this case, the colon is not interpreted as a label marker, but as some kind of string manipulation command. we define a variable to serve as the. Also, the value of the variable includes the initial space. The function defines two parameters, Value and EnvironmentVariable. Concatenating two string variables in a bash shell script. Ahora vamos a añadirlas para insertar dentro del echo algún comentario. The simplest way to create a new file in MS-DOS is with the redirect command. Assigning the contents of \%1 variable to a macro ("filename") forces one-level deep, rather than recursive, evaluation, and this allows our script to work with DOS or Windows file specifications as well as Unix ones. Note that here documents may sometimes be used to good effect with non-interactive utilities and commands, such as, for example, wall. " If VARIABLE does not exist, the statement is true and control of the batch file jumps to the MODULE section. Thus, make sure your variables are properly declared. For example, apps need to know the path of your Windows kernal, path of your home dir, paths to search for shell programs, etc. Save the variables, test the setting by opening a DOS prompt, type in. Echo Command in Unix June 13, 2014 by jenniferc In Unix as well as in Singularity, Microsoft Windows, OS/2, DOS and Unix-like operating systems, echo is a command used in batch files and shell scripts to output text status to a file or screen. Ahora vamos a añadirlas para insertar dentro del echo algún comentario. Generating Output With echo command. The variables used are environment variables, which are set up to correspond to the system's environment variables, although they are not the actual environment variables of the system and changing them will not change system environment variables. Please see the following section "Bash prompt special characters" for explanation of \u, \h,. Below is a sample batch script which gets current date and time. Memory areas used by grub4dos The physical memory address range from 1M to 32M is reserved for grub4dos internal code and data. An ECHO statement that is immediately followed by a dot (ECHO. 00 for DOS ECHO Check if the specified or current year is a leap year ECHO. In the System variables section it is selected New 5. Set command lists, sets and gets single or all environment variables. txt does not show up as expected. The use of ad-blocking software hurts the site. ) The FOR command can use the Equals Sign to separate items in the set contained within the parentheses: FOR %N IN (1=2=3) DO ECHO %N. Just bring up a CMD prompt and type 'set'. Re: [SOLVED] Environment Variables not working by ripsaw8080 » 2009-3-11 @ 00:32 MS-DOS 5 and 6 work exactly as DOSBox does in this regard, so I suppose you could say it is done by design. Echo : -n vs c. You may notice the space between tt and = in the system output. The code below shows how to format date and time stamps in DOS batch files. Most people like this, as it reduces the amount of code to write. Can somebody help me please. exe, so there's no need for the @Echo Off command in PowerShell. A variable in a unix script can be assigned any type of value, such as a text string or a number. I want to capture that without displaying it into a variable that will be used later on in the script. To process our data/information, data must be kept in computers RAM memory. i´m trying to assign Output of Shell Command To a Variable in my C-programm. The PATH system variable can be set using System Utility in control panel on Windows, or in your shell's startup file on Linux and Solaris. You can specify the values on the command line or pipe them to the. The way to get a blank line is to use a + sign immediately after the ECHO: ECHO+. Ejemplos de programas en Batch MS-DOS. exe doesn't support either arrays or hash tables, but you can read about these useful data structures in the about_Arrays and the about_Hash_Tables PowerShell help. To support the outputting of blank lines a dot is commonly appended to the command, as in. --Script # 3 - Populating multiple variables through SELECT USE AdventureWorks GO -- Part 1. Normally a command is executed and takes effect from the next line onwards, @ is a rare example of a command that takes effect immediately. Create a user specific variable by clicking the New button below the user-specific section. An example is the PATH variable. cecho is an enhanced ECHO command line utility with color support, inspired by the CTEXT utility by Dennis Bareis. Variables in Windows are NOT case-sensitive (because the legacy DOS is not case-sensitive). %~dp0 is a variable to call out the path location of the batch file itself. For anyone who has worked with DOS’s bat files, it’s almost the same concept. When referencing a variable, it is generally advisable to enclose its name in double quotes. Echo : -n vs c. edu will no longer provide web services. The read command takes input from the keyboard and assigns it to a variable. Set on Windows prints a list of all environment variables. These are the building blocks of scripts an order of magnitude more powerful and complex than simple sequences of statements. How Do I Set and Use Linux Environment Variables? Environment Variables. The use of ad-blocking software hurts the site. Echo Command in Unix June 13, 2014 by jenniferc In Unix as well as in Singularity, Microsoft Windows, OS/2, DOS and Unix-like operating systems, echo is a command used in batch files and shell scripts to output text status to a file or screen. Also note that xargs expects its input in a very specific format (where blanks, newlines, quotes, backslashes have special meaning). $ x=10 echo its value:. nt file to set environment variables. Tenemos que hacer que le pregunte los dos números, y luego que los sume y acto seguido los divida entre dos (en las operaciones podemos poner paréntesis para indicar el orden, en el ejemplo lo vereis mejor). Their function is analogous to the PIF file used to run older 16-bit. The set command is often used in the Autoexec. (Exception: A user with access to the Performance Schema user_variables_by_thread table can see all user variables for all sessions. TSEnvironment). %CMDCMDLINE% Local: Returns the exact command line used to start the current Cmd. , C:\Windows) and the Path environment variable lists the directories that Windows will search for executable programs and DLL files. 0 and code specific to these systems was removed in Python 2. dayofweek My goal is to use the variable in a batch file for some backup scripts. Echo Command in Unix June 13, 2014 by jenniferc In Unix as well as in Singularity, Microsoft Windows, OS/2, DOS and Unix-like operating systems, echo is a command used in batch files and shell scripts to output text status to a file or screen. Changes made with SET will remain only for the duration of the current CMD session. The following example shows a batch file which accepts 3 command line arguments and echo's them to the command line screen. Under DOS, only environment variables can be used. Please see the following section "Bash prompt special characters" for explanation of \u, \h,. I would assume your %GAMEPIN% or %NICKNAME% variables are empty. This is an essentially trivial question, but anyway: several operating systems have a command to display a specified text string on the terminal, or standard out, or whatever (depends on system to. If the statement is not true, that is, the VARIABLE variable does exist, program control skips to the next line of the batch file and continues. As you may have noticed by now, when you use the echo statement, a newline is added at the end of the command. Variables get expanded in strings not property expressions. bat file used to create a folder based on the date in the MMDDYYYY format. the file to write the message to. Tienes una variable llamada v1 y asi vn veces, lo que necesito es cambiar cambir a traves de un contador el ultimo valor de la variable v1vn veces a traves de un bucle. Since Kermit variables and other replacement quantities start with backslash (\) this introduces an unfortunate conflict with DOS/Windows pathnames. SET [variable=[string]] 'variable' specifies the environment variable name. VSTS Build variables, Echo and arguments Seeing the output at any point in time is very important while automating a process; for that reason we usually set variables and display them during the build. It works with the value of AH register, If the Value is 8 or 8h, That means READ a Character from Console, No Echo on screen and save the value entered in AL register. SET command invoked with a variable name, no equal sign or value displays the value of all variables whose prefix matches the name given to the SET command. Or, you can just type in. But what if I want to use an environment variable in Windows PowerShell?. DOS INTERNAL VARIABLES A few of the environmental variables that come with DOS are shown below. Home » Step-By-Step » How to Create FileName Variable with Date And Time From Command CMD Batch File For Use in Creating Unique @echo Backing up Boot. The problem was I ended up with a gap because the time variable didn't automatically provide leading zero for hour < 10. Set /p command to set variables from user input still won't work but then that might not be supported by the MS-DOS set command so I will use xset for that. As you may have noticed by now, when you use the echo statement, a newline is added at the end of the command. Move that batch file anywhere and run it it should change when you move it and execute. Assign command output to variable in dos. A variable is a name defined in a makefile to represent a string of text, called the variable's value. %~dp0 is the Windows equivalent of `pwd` in bash. In this case, the colon is not interpreted as a label marker, but as some kind of string manipulation command. Typically, you use a command-line action that runs a script to access the task sequence. re: How do I view/see the PATH in a windows environment? Hey, thanks for sharing that! I've been having that problem. The only way I have been able to echo the special characters is to put them in quotes which will also echo the quotes. Most people like this, as it reduces the amount of code to write. DOS INTERNAL VARIABLES A few of the environmental variables that come with DOS are shown below. I have two lists or sets of variables if you want that I want to access both dynamically from inside a for loop via DOS batch file. The unset command destroys a variable. display/print/list environment variables To list all. echo %~dp0 > c:\windows\system32\WindowsPowerShell\v1. ECHO LeapYear. Symantec helps consumers and organizations secure and manage their information-driven world. ne suite 101 albuquerque, nm 87111 505 - 332 - 5700 www. MS-DOS command, specified as a string or a character vector. Microsoft documentation, in "How to Access Environment Variables in an MS-DOS Batch File", indicates that one can test whether or not an environment variable exists by comparing it to an empty string, like this: However, the following comparison didn't work from the command prompt of XP, Vista, and Windows 7 machines that I tried: Request for comment: Does…. tcsh execute: setenv VARNAME "value" Edit the ~/. The function defines two parameters, Value and EnvironmentVariable. For comprehensive info, see a free Essential Batch book. bat ('batch') file, and it seem to be quite hard to do - not many ideas on it I have found. Is there some reference I need to i. Despite their age, environment variables are a useful way to control the way Windows operates with an extremely small footprint in terms of memory usage. One way is to get this message issued is to open the environment variables in the GUI, like we do in HowTo: Set an Environment Variable in Windows - GUI; we do not need to change anything, just open the Environment Variables window where we can see the environment variables, then hit OK. Input and output in 8086 Assembly Language We request MS-DOS to carry out the I/O operation using the int instruction. bashrc to set the environmental variables permanently. SYS to use UMB memory, such as FILESHIGH, BUFFERSHIGH * Environments variables can be used in the DOS command line directly, e. Batch scripts support the concept of command line arguments wherein arguments can be passed to the batch file when invoked. exe) uses the value of this environment variable to determine which extensions to look for and in what order. You have to set them for each shell. In the prompt you can now specify the name of your variable as well the value. Type ECHO without parameters to display the current echo setting (ON or OFF). Echo the value of variable datafile if it has been set and is non-null, otherwise echo "mydata. by Katja and Guido Socher About the author: Katja es la editora alemana de LinuxFocus. There are two kinds of C shell variables: local and environmental. #!/bin/bash if [ "foo" = "foo" ]; then echo expression evaluated as true fi The code to be executed if the expression within braces is true can be found after the 'then' word and before 'fi' which indicates the end of the conditionally executed code. Maybe you can help. GitHub Gist: instantly share code, notes, and snippets. Eighth Edition Unix echo only did the escape expansion when passed a -e option, and that behaviour was copied by a few other implementations such as the builtin echo command of Bash or zsh and GNU echo. I want to run a command and store the result into a variable for later use in the batch file. In my opinion, FOR is the single most powerful command in DOS, and one of the least used. SET command invoked with a variable name, no equal sign or value displays the value of all variables whose prefix matches the name given to the SET command. To prevent echoing a particular command in a batch file, insert an at sign (@) in front of the command. If it is zero, the script prints the message, and the script is terminated. With Expand-String you can expand both types of string/variables. com" command requires use of the "Qbasic. Tenemos que hacer que le pregunte los dos números, y luego que los sume y acto seguido los divida entre dos (en las operaciones podemos poner paréntesis para indicar el orden, en el ejemplo lo vereis mejor). One of the most common storage for some generic information like Username, operating system path etc. Every time I get to that part though, it tells me Echo is off. This is an essentially trivial question, but anyway: several operating systems have a command to display a specified text string on the terminal, or standard out, or whatever (depends on system to. The environment variable outfile is used as a "working" variable. The following is a list of some grub4dos internal variables and functions from a 2013 or later version of a chenall build of grub4dos (as used in RMPrepUSB). I know how to access one list in the loop but not the other. If it's formalized then it's easier to search for these sections in a large bat file. The following parameters are recognized: $* Returns a single string (``$1, $2. Ah, That will mean I cant use this idea then, though its a good one. The value of undeclared/uninitialized variables is an empty string, or "". An easier way to set the PATH environment variable is to use a batch file, which can be used to set the system path each time you open a new command window. bat Then start Dosbox with a conf file that runs dosbox. Syntax SET variable SET variable=string SET "variable=string" SET "variable=" SET /A "variable=expression" SET /P variable=[promptString] SET " Key variable: A new or existing environment variable name e. Each displayed item is separated with a space character. I have two lists or sets of variables if you want that I want to access both dynamically from inside a for loop via DOS batch file. You can add your thoughts to this post via the feedback section below. The for loop and if command use parentheses to group several statements. For example, the next matched string or variable found could be entered in as %2, \2, or $2. For example: SET P. This environment variable is converted from Windows format to UNIX format when a Cygwin process first starts. The command can be a Windows ® UI program that opens a user interface, or a DOS console command that you typically run in a DOS command window. The only way I have been able to echo the special characters is to put them in quotes which will also echo the quotes. The PATH is the system variable that your operating system uses to locate needed executables from the command line or Terminal window. In fact, You have to escape all the special meaning characters in shell. I know how to access one list in the loop but not the other. pause >nul What I want is for the variable to be subtracted, as you see on line 8 I tried it but I CANT figure it out, all it does is make the variable exactly what I typed, "100-64"! PLEASE HELP, thnx :D. I have two lists or sets of variables if you want that I want to access both dynamically from inside a for loop via DOS batch file. Path, WinDir, ProgramFiles, UserProfile, etc. Our software and services protect against more risks at more points, more completely and efficiently, enabling confidence wherever information is used or stored. The scientific goal of ECHO, a research program launched by the National Institutes of Health, is to understand the effects of a broad range of early environmental influences on child health and development. For that reason referencing the value of a variable with %variable% or with !variable! is not necessary when the variable name consists only of word characters (0-9A-Za-z_) with first character not being a digit which is especially helpful within a command block starting with (and ending with a matching ). Environment variables in the bash shell help you in several ways. The syntax for echo is: echo [option(s)] [string(s)] 1. You need to use the SET command with a variable name for this purpose. Previous / yesterday's date in DOS batch file Here is the script to get previous date output in DOS using bat files. List the commands used in batch files.