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How to convert a string to lowercase letters

Swift version: 5.2

Paul Hudson    @twostraws   

You can convert any string to lowercase – that is, going from "HELLO" to "hello" – by calling its lowercased() method, like this:

let str = "Sunday, Monday, Happy Days"
print(str.lowercased())

That will output "sunday, monday, happy days" to the Xcode console.

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Available from iOS 2.0

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

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