Skip to main content

Return Values

How functions return results to callers.

Why this exists​

Return values allow functions to produce outputs and enable function composition.

How it works​

The return statement exits the function and sends a value back to the caller.

Examples​

fn square(x) {
  return x * x
}

set result = square(4)  # 16

fn isEven(n) {
  return n % 2 == 0
}

check isEven(6) {
  say "Even"
}

Common mistakes​

  • Forgetting return statement
  • Returning wrong types
  • Not assigning return values