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<!DOCTYPE html> <html> <body> <h2>JavaScript Functions</h2> <p>Sum of all arguments:</p> <p id="demo"></p> <script> function sumAll() { let sum = 0; for(let i = 0; i < arguments.length; i++) { sum += arguments[i]; } return sum; } document.getElementById("demo").innerHTML = sumAll(1, 123, 500, 115, 44, 88); </script> </body> </html>