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<!DOCTYPE html> <html> <body> <p>Click the button to get the square root of each element in the array.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> var numbers = [4, 9, 16, 25]; function myFunction() { x = document.getElementById("demo") x.innerHTML = numbers.map(Math.sqrt); } </script> </body> </html>