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<body>
<h2>JavaScript Array.reduce()</h2>
<p>This example finds the sum of all numbers in an array:</p>
<p id="demo"></p>
<script>
var numbers = [45, 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>
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