bash how to quit a script

The command "exit" terminate script and return value:

Every command returns an exit status, sometimes it is called exit code or return status.

0: Script was executed with success.

1 and greater: Script was executed with error. Non-zero return value is interpreted as an "error code".

If you want to get exit value last executed script use $?.

./script.sh
echo $?

Sometimes you can see exit $?, which is equivalent to exit.

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