Return Value¶

return¶

The return statement is used to immediately stop evaluation and exist the current context (typically a function call) yielding a return value.

return;             // equivalent to return ();

return 123 + 456;   // returns 579

A return statement at global level exits the script with the return value as the result.

A return statement inside a function call exits with a return value to the caller.

exit¶

Similar to the return statement, the exit function is used to immediately stop evaluation, but it does so regardless of where it is called from, even deep inside nested function calls.

The result value of exit, when omitted, defaults to ().

fn foo() {
    exit(42);       // exit with result value 42
}
fn bar() {
    foo();
}
fn baz() {
    bar();
}

let x = baz();      // exits with result value 42

print(x);           // <- this is never run