<!DOCTYPE html>
<html>
<body>
<p>Click the button to evaluate/execute JavaScript code/expressions.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = 10;
var y = 20;
var a = eval("x * y") + "<br>";
var b = eval("2 + 2") + "<br>";
var c = eval("x + 17") + "<br>";
var res = a + b + c;
document.getElementById("demo").innerHTML = res;
}
</script>
</body>
</html>