How to Convert Strings to Uppercase in JavaScript

To convert a lowercase string to an uppercase string, we use the method toUpperCase() in javascript. This method does not affect numbers, special characters, and alphabets that are already in upper case.

Program to Convert Strings to Uppercase in JavaScript
<!doctype html>
         function maj() {
           var str = "Welcome to StackHowTo!";
           var res = str.toUpperCase();
           document.getElementById("text").innerHTML = res;
      <p>Welcome to StackHowTo!</p>
      <button onclick="maj()">Click here to convert the string</button>
      <p id="text"></p>

Welcome to StackHowTo!

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