JavaScript Program to Convert Lowercase to Uppercase

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Convert Lowercase to Uppercase Program in JavaScript

To convert lowercase letter to uppercase letter we use toUpperCase() method in javascript. In jAvaScript toUpperCase() method converts a string to uppercase letters. This function does not affect any of the special characters, digits and the alphabets that are already in upper case.

Syntax to Convert Lower to UpperCase in JavaScript


JavaScript program to conver lowercase letter into uppercase letter

<!doctype html>

function myFunction() {
  var str = "Hello Coder!";
  var res = str.toUpperCase();
  document.getElementById("demo").innerHTML = res;


<button onclick="myFunction()">Click Here for Convert String</button>
<p id="demo"></p>


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