<!DOCTYPE html>
<html lang="en-US">
<body>
<p>Sum of Elements in myNumber is<p>
<script>
var myNumber = [1, 2, 3, 4, 5, 6, 7];
function sumUp(accumulator, currentValue, currentIndex, arr) {
return num =accumulator+currentValue;
}
document.write(myNumber.reduce(sumUp, 100));
</script> </body>
</html>