Swift – Convert a String to Uppercase

To convert a String to Uppercase in Swift, use String.uppercased() function. Call uppercased() function on the String. The function returns a new string with the contents of the original string transformed to uppercase alphabets.

The syntax to convert a String str to Uppercase is

str.uppercased()

uppercased() function returns a new String.

Example

In this example, we will take a string in variable str and convert this string to uppercase using String.uppercased() function.

main.swift

import Foundation

var str = "Hello World"
var result = str.uppercased()
print("Original  String : \(str)")
print("Uppercase String : \(result)")

Output

Original  String : Hello World
Uppercase String : HELLO WORLD

Conclusion

In this Swift Tutorial, we learned how to convert a string to uppercase using String.uppercased() function.