Swift String uppercased()

In this tutorial, we will learn about the Swift String uppercased() method with the help of examples.

The uppercased() method converts all lowercase characters in a string into uppercase characters.

Example

var message = "swift is fun"

// convert message to uppercase
print(message.uppercased())

// Output: SWIFT IS FUN

uppercased() Syntax

The syntax of uppercased() method is:

string.uppercased()

Here, string is an object of the String class.

uppercased() Parameters

uppercased() method doesn't take any parameters.

uppercased() Return Value

returns the given string in uppercase.

Example 1: Swift uppercased()

var string = "this should be uppercase!"
print(string.uppercased())

// string with numbers
// all alphabets should be uppercase
var string2 = "Th!s Sh0uLd B3 uPp3rCas3!"
print(string2.uppercased())

Output

THIS SHOULD BE UPPERCASE!
TH!S SH0ULD B3 UPP3RCAS3!

Example 2: Compare Two Strings Using uppercased()

// first string
var str1 = "swift is awesome!"

// second string
var str2 = "SwIfT Is AwEsOmE!"

// compare two strings
if(str1.uppercased() == str2.uppercased()) {
  print("The strings are same.")
}
else {
  print("The strings are not same.")
}

Output