JavaScript String toUpperCase() method

The toUpperCase() method in JavaScript is used to convert all the characters in a string to uppercase letters.

Syntax: string.toUpperCase()

- string: The string you want to convert to uppercase.

Example:

let str = "hello, world!";

let upperCaseStr = str.toUpperCase();

console.log(upperCaseStr); // Output: HELLO, WORLD!

Explanation:

- We have a string str containing the text "hello, world!".

- We use toUpperCase() to convert all the characters in the string to uppercase.

- The resulting string, "HELLO, WORLD!", is stored in the variable upperCaseStr and logged to the console.

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