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<!DOCTYPE html> <html> <body> <p>Click the button to evaluate/execute JavaScript code/expressions.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = 10; var y = 20; var a = eval("x * y") + "<br>"; var b = eval("2 + 2") + "<br>"; var c = eval("x + 17") + "<br>"; var res = a + b + c; document.getElementById("demo").innerHTML = res; } </script> </body> </html>