6. Functions

//: Playground - noun: a place where people can play
 
import UIKit
 
func sayHello()
{
    print("Hello")
}
 
sayHello()
 
func sayHello2(name:String)
{
    print("Hello \(name)")
}
 
sayHello2("Programmer")
 
func sayHelloi3(name:String = "defaultValue")
{
    print("Hello \(name)")
}
 
sayHelloi3("Song")
 
func sayHello4(name2 name:String="Song",age2 age:Int) -> String
{
    
    return "Hello \(name) is \(age) years old"
}
 
print(sayHello4(name2:"Song", age2: 3))
 
 
func sayHello5( name:String="Song", age:Int) -> String
{
    
    return "Hello \(name) is \(age) years old"
}
 
print(sayHello5("Song", age: 3))
 
 
func sayHello6( name:String="Song", _ age:Int) -> String
{
    
    return "Hello \(name) is \(age) years old"
}
 
print(sayHello6("Song", 3))