How to check whether an integer lies inside a range

Paul Hudson    February 14th 2018    @twostraws

All Swift’s ranges come with a built-in contains() method that lets us check whether one value lies inside or outside the range. For example, given this range:

let passRange = 85...100

And this integer:

let score = 88

We can check whether score lies inside passRange using contains(), like this:

if passRange.contains(score) {
    print("You passed the test!")
} else {
    print("Better luck next time.")
}

Available from iOS 8.0

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

Tweet

Other people are reading…

• What is the ternary operator?
• What is MVC?
• Tips for Android developers switching to Swift
• How to use try/catch in Swift to handle exceptions
• How to convert an NSRange to a Swift string index

About the Swift Knowledge Base

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