Set environment variable in batch file windows

You can have more than one setlocal or endlocal command in a batch program that is, nested commands. Otherwise, it's set to 1. You can use this information in batch scripts to determine whether the extensions are available, as shown in the following example:.

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Is this page helpful? Normally, variable having a global scope can be accessed anywhere from a program whereas local scoped variables have a defined boundary in which they can be accessed.

DOS scripting also has a definition for locally and globally scoped variables. By default, variables are global to your entire command prompt session. The following example shows the difference when local and global variables are set in the script. If you have variables that would be used across batch files, then it is always preferable to use environment variables. Following is an example of an output. Batch Script - Variables Advertisements.

If used without parameters, set displays the current environment variable settings. The set command can also run from the Windows Recovery Console, using different parameters. If command extensions are enabled the default and you run set with a value, it displays all of the variables that begin with that value.

If you use quotation marks to enclose a string that contains one of the special characters, the quotation marks are set as part of the environment variable value. Use environment variables to control the behavior of some batch files and programs and to control the way Windows and the MS-DOS subsystem appears and works. The set command is often used in the Autoexec.

If you use the set command without any parameters, the current environment settings are displayed. If the variable already exists in the environment, the new string value replaces the old string value.

Any non-numeric strings in the expression are considered environment variable names, and their values are converted to numbers before they are processed.