Return Values

Return Values

A function can hand a result back to the caller with return.

A function that returns an int

int add(int a, int b) {
    return a + b;
}

Using the return value

int result = add(3, 4);
printf("%d", result);   // 7

The return type must match

• int add(...) must return an int.
• double area(...) returns a double.
• void returns nothing (no return needed).

Early return

int bigger(int a, int b) {
    if (a > b) return a;
    return b;
}

TL;DR

• return value sends a result back to the caller.
• The declared return type must match what you return.
• Capture the result in a variable.
• void functions return nothing.