Swift Programming: The Big Nerd Ranch Guide

Nested ifs

You can nest if statements for scenarios with more than two possibilities. You do this by writing an if/else statement inside the curly braces of another if/else statement. To see this, nest an if/else statement within the else block of your existing if/else statement.

Listing 3.5 Nesting conditionals

import Cocoa

var population: Int = 5422
var message: String
var hasPostOffice: Bool = true

if population < 10000 {
    message = "\(population) is a small town!"
} else {
    if population >= 10000 && population < 50000 {
        message = "\(population) is a medium town!"
    } else {
        message = "\(population) is pretty big!"
    }
}
print(message)

if !hasPostOffice {
    print("Where do we buy stamps?")
}

Your nested if clause makes use of the ...