How to properly check if a string is empty in Go?

Hello everyone! I just started learning Go, and I have a problem with checking strings for emptiness. I'm writing a small service for processing user input, and I need to make sure that strings are not empty before using them. The problem is that I see several ways to do this, but I don't understand which one is correct and efficient. Here's what I've tried: ```go func processInput(input string) bool { // Method 1: comparison with empty string if input == "" { return false } // Method 2: length check if len(input) == 0 { return false } // Method 3: byte comparison if len([]byte(input)) == 0 { return false } return true } ``` All three methods seem to work, but I'm confused: