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