CODEWITHSUNDEEP
variablesbatch-filecommand
kgflying
kgflying

Reputation: 244

What's the difference between @ an non @ command in batch script?

What's the difference between @ an non @ command in batch script? Eg, what's the difference between @IF and IF

One more question: What's the difference between % and %% in batch script? Eg, what's the difference between %G and %%G

Thanks.

Upvotes: 0

Views: 863

Answers (1)

Nate Hekman
Nate Hekman

Reputation: 6657

@ at the beginning of a line will execute the line but not write it to the output. It's like turning echo off just for that line. See What does @ mean in Windows Batch scripts?

%% is used in for loops inside a batch file to escape a variable name you want to "declare". For example:

for %%a in (*.txt) do ( echo %%a )

If you write the same for loop but not in a batch file, you would not double the %:

for %a in (*.txt) do ( echo %a )

I have never understood why, I just know that's the way it is. :-) Maybe someone else can elaborate.

Upvotes: 3

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