Variable Parameters

Question

Is it possible in swift 4.1 to Use the keyword var as a prefix to the parameter name to define a variable parameter?

ex.
func myFunc(var num1: Int, num2: Int) -> Int {
num1 = num1 + num2
return num1
}

Answer 1

Argument of a function in Swift is let by default so change it to var if you need to alter the value i.e,

func reduceToZero(var x:Int) -> Int { while (x != 0) { x = x-1 } return x }