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exit status

The number a program hands back when it ends; 0 means success.

An exit status is the integer a process returns to the operating system when it ends; by convention 0 means success and anything else means failure.

Examples

  • After cd nosuchfolder fails, echo $? prints 1; after a command that works it prints 0.

  • A Rust program that panics ends with exit status 101.

See also

terminal panic program
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