Javascript String toUpperCase()

const message = "javascript is fun";

// convert message to uppercase
const upperMessage = message.toUpperCase();
console.log(upperMessage);

// Output: JAVASCRIPT IS FUN

toUpperCase() Syntax

The syntax of the toUpperCase() method is:

str.toUpperCase()

Here, str is a string.

toUpperCase() Parameters

The toUpperCase() method does not take in any parameters.

toUpperCase() Return Value

• Returns a new string representing the calling string converted to uppercase.

Example: Using toUpperCase() method

let str = "Hello World!";
let sentence = "Java is to JavaScript what Car is to Carpet.";

let uppercase_str = str.toUpperCase();
console.log(uppercase_str); // HELLO WORLD!

let uppercase = sentence.toUpperCase();
console.log(uppercase); // JAVA IS TO JAVASCRIPT WHAT CAR IS TO CARPET.

Output

HELLO WORLD!
JAVA IS TO JAVASCRIPT WHAT CAR IS TO CARPET.

Recommended Reading: JavaScript String toLowerCase()