<!DOCTYPE html>
<html>
<body>
<p>Click the button to get the sum of the numbers in the array.</p>
<button onclick="numbers.forEach(myFunction)">Try it</button>
<p>Sum of numbers in array: <span id="demo"></span></p>
<script>
var sum = 0;
var numbers = [65, 44, 12, 4];
function myFunction(item) {
sum += item;
demo.innerHTML=sum;
}
</script>
</body>
</html>