NEW: Subscribe to Hacking with Swift+ and accelerate your learning! >>

Simple types: Summary

You’ve made it to the end of the first part of this series, so let’s summarize.

  1. You make variables using var and constants using let. It’s preferable to use constants as often as possible.
  2. Strings start and end with double quotes, but if you want them to run across multiple lines you should use three sets of double quotes.
  3. Integers hold whole numbers, doubles hold fractional numbers, and booleans hold true or false.
  4. String interpolation allows you to create strings from other variables and constants, placing their values inside your string.
  5. Swift uses type inference to assign each variable or constant a type, but you can provide explicit types if you want.
Hacking with Swift is sponsored by Instabug

SPONSORED Are you tired of wasting time debugging your Swift app? Instabug’s SDK is here to help you minimize debugging time by providing you with complete device details, network logs, and reproduction steps with every bug report. All data is attached automatically, and it only takes a line of code to setup. Start your free trial now and get 3 months off exclusively for the Hacking with Swift Community.

Start your free trial!

Sponsor Hacking with Swift and reach the world's largest Swift community!

BUY OUR BOOKS
Buy Pro Swift Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift (Vapor Edition) Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Server-Side Swift (Kitura Edition) Buy Beyond Code

Was this page useful? Let us know!

Average rating: 4.8/5

Link copied to your pasteboard.