NEW: Start my new Ultimate Portfolio App course with a free Hacking with Swift+ trial! >>

Combining conditions

Swift has two special operators that let us combine conditions together: they are && (pronounced “and”) and || (pronounced “or”).

For example, we could check that the age of two people are both over a certain value like this:

let age1 = 12
let age2 = 21

if age1 > 18 && age2 > 18 {
    print("Both are over 18")
}

That print() call will only happen if both ages are over 18, which they aren’t. In fact, Swift won’t even bother checking the value of age2 because it can see that age1 already failed the test.

The alternative to && is ||, which evaluates as true if either item passes the test. For example we could print a message if either age is over 18:

if age1 > 18 || age2 > 18 {
    print("At least one is over 18")
}

You can use && and || more than once in a single condition, but don’t make things too complicated otherwise it can be hard to read!

Hacking with Swift is sponsored by Instabug

SPONSORED Catch bugs as soon as they happen and know exactly why a crash occurred. Instabug's SDK grabs all the logs they need to fix bugs, crashes and performance issues in minutes instead of days. Get screenshots, device details, network logs, repro steps, and tons of other critical insights needed to resolve issues and prioritize product backlogs straight from your dashboard. It only takes a minute to integrate!

Get started now

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: 1.0/5

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.