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 
	print(value)
	}

• 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
incrementAndPrint(&value)
print(value)