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What is the at sign (@) in a batch file and what does it do?

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What does %% do in batch file?

Use double percent signs ( %% ) to carry out the for command within a batch file. Variables are case sensitive, and they must be represented with an alphabetical value such as %a, %b, or %c. Required. Specifies one or more files, directories, or text strings, or a range of values on which to run the command.

What does %* mean in batch file?

%* expands to the complete list of arguments passed to the script. You typically use it when you want to call some other program or script and pass the same arguments that were passed to your script.

What does @echo off do in batch script?

If used in a batch file, echo on and echo off don't affect the setting at the command prompt. To prevent echoing a particular command in a batch file, insert an @ sign in front of the command. To prevent echoing all commands in a batch file, include the echo off command at the beginning of the file.


At symbol - @

The @ symbol tells the command processor to be less verbose; to only show the output of the command without showing it being executed or any prompts associated with the execution. When used it is prepended to the beginning of the command, it is not necessary to leave a space between the "@" and the command.

When "echo" is set to "off" it is not necessary to use "@" because setting "echo" to "off" causes this behavior to become automatic. "Echo" is usually set to "on" by default when the execution of a script begins. This is the reason "@echo off" is commonly used, to turn echo off without displaying the act of turning it off.

echo verbose
@echo less verbose
pause