The [and [[evaluate conditional expression. The name of the variable whose contents will be checked. I’m going to assume you’re writing a batch file, so if you want to practice from the command line, remember to collapse the double … I need to write a batch file that will check if a variable contains specific value. Another special case for the ‘if’ statement is the "if exists ", which is used to test for the existence of a file. More > specifically, if the firm name contains certain information, let say > the extension GHMB, I would infer that the firm is incorporated in > Germany. This is a synonym for the test command/builtin. Example 1: A researcher has addresses as a string variable and wants to create a new variable that contains just the zip codes. However, [[is bash’s improvement to the [command. Bash check if a string contains a substring . Following is the general syntax of the statement. If exist somefile.ext do_something Following is an example of how the ‘if exists’ statement can be used. Checks whether a variable's contents match one of the items in a list.. if Var in MatchList if Var not in MatchList if Var contains MatchList if Var not contains MatchList Parameters Var. By "dropping" their values in the CMD.EXE session (SET Date=), they get back their dynamic (or system) values again.So now we have a way to check if a "hidden" variable … For the "contains… Batch script how to check a variable if all letters and/or numbers « on: January 19, 2009, 06:13:34 AM » I need to check a variable in my dos batch script if it contains all letter and/or all numbers. I am trying to write a batch file that has to do the following: 1) run a command that has some output. The following process explains how this check box works in batch tree: Set variable as check box in task settings: In task settings XML file, add a new variable and settings pair in the Display variables section. The loop variable in the FOR command takes one percent sign if you are executing it directly from the command prompt, but two percent signs if you are executing it from a batch file. With reference to the above example, you can add a variable IsChecked. It looks like these "hidden" variables are defined, but the SET command doesn't see them as defined unless their values are set in the CMD.EXE session (or one of its parent sessions). Parameter substitute is another way to check the variable is set or unset. This latter > variable has a lot of missing values, which I would like to fill in to > the extent possible by using the firm name variable. In general, when a batch file invokes another one, the flow execution is transfered to the called batch and does not return to the caller. ... bat file script to check if string contains other string. If the variable is set, then the value of the string will return otherwise null will return. For the "in" operator, an exact match with one of the list items is required. For example: 0 0 11, 1, 001. Create a bash file named check_var1.sh with the following script. "Variable str1 is defined" "Variable str3 is not defined" if exists. Example-1: Check the variable is set or unset using ‘-z’ option. Please note that the following is bash specific syntax and it will not work with BourneShell: Re: check if the contents of a variable is in another variable Posted 06-19-2019 10:50 AM (3843 views) | In reply to Billybob73 How can I get the find function to work using a field that contains a comma separated list of numbers (i.e 610,610,613,614,675,675)? Or the _ immediately after the variable's name will be taken as part of the variable's name (it's a valid character in a variable … Example 2: We have a variable that contains full names in the order of first name and then last name. We want to create a new variable with full name in the order of last name and then first … 2) check if the output contains some text 3) if yes - do something What I tryed to do is to save the output to a file and then save the data from file to variable: [command] > c:\temp.txt set /p RetVal= < c:\temp.txt … …