Swift Input and Output
Input and output is two standard mechanism. This is capable to input value by keyboards and result is producing on console screen. That mechanism are work on runtime of during program execution based on custom demand.
print("Enter your name") var name:String=readLine()! print("Welcome, \(name)")
Enter your name lio Welcome, lio
print() This function are used to display constant string or variables values.
//define a variable let name="Foo" print("Welcome mister \(name)")
Welcome mister Foo
In this print statement is similar to c, c++ and python programming language that are used to display a message on console screen. But note that, there is no need to import any extra library to input and output to console. print() is global function that can be used any place in source code. There structure of this function as follows.
Terminator is an by default new line character. There is possible to modified that is in following way.
print("One",terminator : " ") print("Two",terminator : " ") print("Three")
One Two Three
In this example print statement is terminating by double white space. And separator can be used in following ways.
//label of separator is _ underscores print("One",_:"...",terminator:"") print("Two",_:"...",terminator:"") print("Three")
One ...Two ...Three