swift guard let
func submit() { guard let name = nameField.text else { show("No name to submit") return } guard let address = addressField.text else { show("No address to submit") return } guard let phone = phoneField.text else { show("No phone to submit") return } sendToServer(name, address: address, phone: phone) } func sendToServer(name: String, address: String, phone: String) { ... }
Source: thatthinginswift.com
guard let swift
guard let value1 = number1, let value2 = number2 else { return }
Swift guard-let Statement
func checkAge() { var age: Int? = 22 guard let myAge = age else { print("Age is undefined") return } print("My age is \(myAge)") } checkAge()