No Return Values Expected

Why This Happens

In Go, a function without return types in its signature cannot return any values. If you add a return statement with a value, the compiler rejects it. You must add the return type to the signature or remove the returned value.

The Problem

func process(data string) {
    result := len(data)
    return result // too many return values
}

The Fix

func process(data string) int {
    result := len(data)
    return result
}

Step-by-Step Fix

1. 1

   Identify the function

   Find the function that is returning a value without declaring a return type.

2. 2

   Decide on the design

   Determine if the function should return a value or if the return should be removed.

3. 3

   Update the signature

   Add the appropriate return type to the function signature or remove the return value.