How to convert a string to uppercase letters
Swift version: 5.10
If you want to convert a string to uppercase – that is, WHERE EVERY LETTER IS A CAPITAL LETTER – you should use the uppercased() method of your string, like this:
let str = "Sunday, Monday, Happy Days"
print(str.uppercased())That code will print "SUNDAY, MONDAY, HAPPY DAYS" into the Xcode console.
SPONSORED Alex is the iOS & Mac developer’s ultimate AI assistant. It integrates with Xcode, offering a best-in-class Swift coding agent. Generate modern SwiftUI from images. Fast-apply suggestions from Claude 3.5 Sonnet, o3-mini, and DeepSeek R1. Autofix Swift 6 errors and warnings. And so much more. Start your 7-day free trial today!
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 2.0
Similar solutions…
- How to make TextField uppercase or lowercase using textCase()
- How to convert a string to lowercase letters
- How to loop through letters in a string
- How to add spacing between letters in text
- How to convert dates and times to a string using DateFormatter
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
