Swift Programming: The Big Nerd Ranch Guide

Switch It Up

Create a new playground called Switch and set up a switch.

Listing 5.1 Your first switch

import Cocoa

var str = "Hello, playground"

var statusCode: Int = 404
var errorString: String
switch statusCode {
case 400:
    errorString = "Bad request"

case 401:
    errorString = "Unauthorized"

case 403:
    errorString = "Forbidden"

case 404:
    errorString = "Not found"

default:
    errorString = "None"
}

The switch statement above compares an HTTP status code against four cases in order to match a String instance describing the error. Because case 404 matches statusCode, errorString is assigned to be equal to "Not found", as you can see in the sidebar (Figure 5.1). Try changing the value of statusCode to see the other results. When you ...