Book Image

iOS 15 Programming for Beginners - Sixth Edition

By : Ahmad Sahar, Craig Clayton
5 (1)
Book Image

iOS 15 Programming for Beginners - Sixth Edition

5 (1)
By: Ahmad Sahar, Craig Clayton

Overview of this book

With almost 2 million apps on the App Store, iOS mobile apps continue to be incredibly popular. Anyone can reach millions of customers around the world by publishing their apps on the App Store. iOS 15 Programming for Beginners is a comprehensive introduction for those who are new to iOS. It covers the entire process of learning the Swift language, writing your own app, and publishing it on the App Store. Complete with hands-on tutorials, projects, and self-assessment questions, this easy-to-follow guide will help you get well-versed with the Swift language to build your apps and introduce exciting new technologies that you can incorporate into your apps. You'll learn how to publish iOS apps and work with Mac Catalyst, SharePlay, SwiftUI, Swift concurrency, and much more. By the end of this iOS development book, you'll have the knowledge and skills to write and publish interesting apps, and more importantly, to use the online resources available to enhance your app development journey.
Table of Contents (32 chapters)
1
Part 1: Swift
10
Part 2: Design
15
Part 3: Code
25
Part 4: Features

Exploring operators

You can perform arithmetic, comparison, and logical operations in Swift. Arithmetic operators are for common mathematical operations. Comparison and logical operators check an expression's value and return true or false.

Important Information

For more information on operators, visit https://docs.swift.org/swift-book/LanguageGuide/BasicOperators.html.

Let's look at each operator type in more detail. You'll start with arithmetic operators (addition, subtraction, multiplication, and division) in the next section.

Using arithmetic operators

You can perform mathematical operations on integer and floating-point numbers by using the standard arithmetic operators shown here:

Figure 2.14: Arithmetic operators

Let's see how these operators are used. Follow these steps:

  1. Add the following code to add arithmetic operations to your playground:
    let sum = 23 + 20
    let result = 32 - sum
    let total = result * 5
    let...