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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="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>