Call By Value Result

Call by Value

  • this also known as copy-in copy-out.
  • we use inout key word before mentioning the type of the parameter.
	func incrementAndPrint(_ value: inout Int){
	value += 1 
  • this inout keyword indicates that this parameter should be copied in,local copy used within the function and then copied back out when the function returns.
  • when you calling for the function that using this behavior you need to add ampersand(&) before the argument.
var value = 5