I think, you must have heard about divide by zero to get infinity value, so in this example we are going to divide 100 by 0 and which will result in infinity.
See the code
<!DOCTYPE html>
<html>
<head>
<title>Welcome to LearnKode - A code learning platform</title>
</head>
<body>
<p>Click the button to display divede by zero infinity.</p>
<button onclick="infinity()">Click it</button>
<p id="sample"></p>
<script>
function infinity() {
var y = 100;
document.getElementById("sample").innerHTML = y/0;
}
</script>
</body>
</html>