If you want to convert all the letters in a string to uppercase, then use the toUpperCase() method. It is important to note that the toUpperCase() method does not modify the original string and returns a new string having all characters in uppercase.
The syntax for the toUpperCase() method is:
let upperCaseString = string.toUpperCase();
The following example converts all the characters in a string to uppercase:
let str = "JavaScript String"; let newString = str.toUpperCase(); console.log(newString); //JAVASCRIPT STRING console.log(str); //JavaScript String
