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 −
<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 −
