SWIFT

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) {
  ...
}

guard let swift

guard let value1 = number1, let value2 = number2 else { return }

Swift Guard statement

func testFunction() {
	let someValue:Int? = 5
	guard let temp = someValue else {
		return
	}
	print("It has some value (temp)")
}

testFunction()

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()

Swift Syntax of guard Statement

guard expression else {
  // statements
  // control statement: return, break, continue or throw.
}

Swift Guard Statement

var i = 2

while (i <= 10) {
    
  // guard condition to check the even number 
  guard i % 2 == 0 else {
   
     i = i + 1
    continue
  }

  print(i)
  i = i + 1
}