Batch file Test.cmd:
@set args=args1 @set value=value1 @if defined value ( @echo args: [%args%], value: [%value%] @set args=%args% /value=%value% @echo args: [%args%] ) @echo args: [%args%] Output of command >.\Test.cmd:
args: [args1], value: [value1] args: [args1] args: [args1 /value=value1] Why do each of my calls to @echo args: [%args%] return different values? (One without the updated args value, args1, and one with the update, args1 /value=value1)
To start with, instead of using @ at the beginning of each line, just put @echo off at the very start of your script which will do the same but save you having to put @ on every line.
I would also suggest using setlocal at the begining of your scripts to avoid leavng variables defined on your system once the CMD window/script closes. It causes the variables to only be accessible for that CMD/script instance.
Try the following code and notice the echo args: [!args!]
@echo off Setlocal EnableDelayedExpansion set args=args1 set value=value1 if defined value ( echo args: [%args%], value: [%value%] set args=%args% /value=%value% echo args: [!args!] ) echo args: [%args%] endlocal pause Output:
args: [args1], value: [value1] args: [args1 /value=value1] args: [args1 /value=value1] Read up more about the use of EnableDelayedExpansion here...https://ss64.com/nt/delayedexpansion.html
