The minimum is 0, and that's considered the success value. All the other ones are failure. The maximum is 255 also known as -1.

These rules apply for both scripts and other executables, as well as shell functions.

Bigger values result to modulo 255.

The minimum is 0, and that's considered the success value. All the other ones are failure. The maximum is 255 also known as -1.

These rules apply for both scripts and other executables, as well as shell functions.

Bigger values result to modulo 256.