Number pattern in JavaScript

JavascriptWeb DevelopmentFront End Technology

We are required to write a JavaScript and HTML program that provides the user with a text input and button. When the user enters any value in the input, say 5, and clicks the button, we should print the following pattern on the screen.

(for n = 5)

01
01 02
01 02 03
01 02 03 04
01 02 03 04 05

Example

The code for this will be −

 Live Demo

<html>
<head>
<title>JavaScript Number Patterns</title>
<script type="text/javascript">
   const printPattern = () => {
      const num = document.getElementById("rows").value;
      for(let m=1; m <= num; m++){
         for(let n=1; n <= m; n++){
            document.write("0"+n+" ");
         }
         document.write("<br />");
      }
   }
</script>
</head>
<body>
<p>Enter the number of rows and press print</p>
<input type="number" placeholder="Number of Rows" id="rows">
<button type="button" onclick="printPattern()">Print</button>
</body>
</html>

Output

And the output in the console will be −

Before entering values −

Final result

raja
Updated on 22-Feb-2021 09:58:20

Advertisements