How to convert a string to lowercase letters
Swift version: 5.1
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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