NEW: Master Swift design patterns with my latest book! >>

How to make a number positive using abs()

Written by Paul Hudson    @twostraws

The abs() function returns the absolute value of a number, which is a way of describing how far away from zero it is without thinking about whether it’s positive or negative. It’s most commonly used if you have a number that you need to be positive, because whether you pass 30 or -30 to abs() you get back 30.

In code it’s just this:

let number = -15
let absolute = abs(number)

That will set absolute to 15.

Available from iOS 8.0

Did this solution work for you? Please pass it on!

Other people are reading…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

Swift on the server is here

Get ahead of the game and learn server-side Swift with my latest book – build real-world projects while you learn!

Click here to visit the Hacking with Swift store >>