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<!DOCTYPE html> <html> <body> <p>Click the button to create an array, then display it's length.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var fruits = ["Banana", "Orange", "Apple", "Mango"]; document.getElementById("demo").innerHTML = fruits.length; } </script> </body> </html>