Get Swift for Absolute Beginners PDF

By Gary Bennett, Brad Lees

The pro improvement crew that introduced you variations of Objective-C for absolutely the newbies and feature taught millions of builders worldwide to jot down essentially the most renowned iPhone apps of their different types at the app shop, have now leveraged their guideline for Swift.

Swift for Absolute rookies is ideal for people with no programming historical past, people with a few programming adventure yet no object-oriented adventure, or those who have a superb notion for an app yet haven’t programmed for the reason that school.

Gary Bennett and Brad Lees are full-time expert iOS builders and feature constructed a wide spectrum of apps for Fortune 500 businesses. The authors have taken their mixed 12 years of writing apps, educating on-line iOS classes, the event from their first iOS books, besides their loose on-line guideline and unfastened on-line discussion board to create a superb education book.

Topics include:
How to achieve success at studying Swift
Using rapid Playgrounds to profit iOS improvement quickly
What is item orientated Programming
What are fast periods, homes, and functions
Proper consumer interface and consumer adventure design
Swift info varieties: integers, floats, strings, booleans
How to take advantage of speedy information collections: arrays and dictionaries
Boolean good judgment, evaluating info, and circulation control
Writing iPhone apps from scratch
Avoiding speedy pitfalls

Many scholars have a tough time believing they could learn how to write iOS apps or simply staying influenced via studying the method. This e-book, besides the loose, reside on-line education classes, is helping scholars remain encouraged and conquer stumbling blocks whereas they discover ways to be nice iOS builders.

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Extra resources for Swift for Absolute Beginners

Sample text

Exercises Write code within a Swift playground that multiplies two integers and displays the result. Write code within a Swift playground that squares a float. Display the resulting float. Write code within a Swift playground that subtracts two floats, with the result being stored as an integer. Note that rounding does not occur. Chapter 4 Making Decisions, Program Flow, and App Design One of the great things about being an iOS developer is you get to tell your devices exactly what you want them to do and they do it—your devices will do tasks over and over again without getting tired.

All data is stored in a variable, and the variable has to have a variable type. For example, in Swift, the following are variable declarations with their associated data types: var var var var x = 10 y = 2 z = 0 submarineName = "USS Nevada SSBN-733" Data types cannot be mixed with one another. You cannot do the following: z = x + submarineName Mixing data types will cause either compiler warnings or compiler errors, and your app will not run. Swift is smart enough to know when you declare a variable what type it is: Int, Float, Double, String, Bool.

Pseudocode can be written by hand on paper (or a whiteboard) or typed on a computer. Using pseudocode, you can apply what you know about Boolean data types, truth tables, and comparison operators. Refer to Listing 4-1 for some pseudocode examples. Listing 4-1. isComplete { do stuff } else { //in this example, isComplete is TRUE so the else block will be executed do other stuff } Note that ! switches the value of the Boolean it’s applied to; so, using ! makes a TRUE value into a FALSE and makes a FALSE value into a TRUE.

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