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<!DOCTYPE html> <html> <body> <h1>JavaScript Functions</h1> <h2>Callback Functions</h2> <p>The result of the calculation is:</p> <p id="demo"></p> <script> function myDisplayer(something) { document.getElementById("demo").innerHTML = something; } function myCalculator(num1, num2, myCallback) { let sum = num1 + num2; myCallback(sum); } myCalculator(5, 5, myDisplayer); </script> </body> </html>