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Top Forums Shell Programming and Scripting Check if a variable is a number - perl Post 302159137 by garric on Thursday 17th of January 2008 05:57:04 AM
Old 01-17-2008
Check if a variable is a number - perl

Logic of code

if ( $var is a number ) {
Do something
}
else {
Do something else
}

My question is: How do I check if a variable is a number. All the reg ex that I came up with to match this is failing. Please help.
 

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GIT-VAR(1)							    Git Manual								GIT-VAR(1)

NAME
       git-var - Show a Git logical variable

SYNOPSIS
       git var ( -l | <variable> )

DESCRIPTION
       Prints a Git logical variable.

OPTIONS
       -l
	   Cause the logical variables to be listed. In addition, all the variables of the Git configuration file .git/config are listed as well.
	   (However, the configuration variables listing functionality is deprecated in favor of git config -l.)

EXAMPLE
	   $ git var GIT_AUTHOR_IDENT
	   Eric W. Biederman <ebiederm@lnxi.com> 1121223278 -0600

VARIABLES
       GIT_AUTHOR_IDENT
	   The author of a piece of code.

       GIT_COMMITTER_IDENT
	   The person who put a piece of code into Git.

       GIT_EDITOR
	   Text editor for use by Git commands. The value is meant to be interpreted by the shell when it is used. Examples: ~/bin/vi,
	   $SOME_ENVIRONMENT_VARIABLE, "C:Program FilesVimgvim.exe" --nofork. The order of preference is the $GIT_EDITOR environment variable,
	   then core.editor configuration, then $VISUAL, then $EDITOR, and then the default chosen at compile time, which is usually vi.

       GIT_PAGER
	   Text viewer for use by Git commands (e.g., less). The value is meant to be interpreted by the shell. The order of preference is the
	   $GIT_PAGER environment variable, then core.pager configuration, then $PAGER, and then the default chosen at compile time (usually
	   less).

SEE ALSO
       git-commit-tree(1) git-tag(1) git-config(1)

GIT
       Part of the git(1) suite

Git 2.17.1							    10/05/2018								GIT-VAR(1)
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