Explain the importance of idempotency of roles in Ansible and how it affects the automation process.

In Go, to add the returned value of a function to the call stack, you need to explicitly use the return operator with that value. When the function is called, the return value is placed on the call stack, from where the caller can retrieve it.

Example:

func add(a int, b int) int {
    return a + b // return value is added to the call stack
}

func main() {
    result := add(2, 3) // result gets the value from the call stack
    fmt.Println(result)  // output: 5
}

Without the return operator, the value will not be returned and will not enter the call stack.