Just tried it. In Swift: 3 == true // Give an error (operator overload doesn't cover this) true == 3 // Returns false nil == false // Returns false

Just tried it. In Swift: 3 == true // Give an error (operator overload doesn't cover this) true == 3 // Returns false nil == false // Returns false You can't use nil or integers directly in an if statement without a function to return a logic value.