Try it Editor: JavaScript Array.reduce()

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<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Array.reduce()</h2>

<p>Checks if all array values pass a test.</p>

<p id="demo"></p>

<script>
var numbers = [4, 9, 16, 25];
var sum = numbers.reduce(myFunction);

document.getElementById("demo").innerHTML = "The sum is " + sum;

function myFunction(total, value, index, array) {
    return total + value;
}
</script>

</body>
</html>

Result :