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<!DOCTYPE html> <html> <body> <h2>JavaScript Comparisons</h2> <p>Input your age and click the button:</p> <input id="age" value="18" /> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { let voteable; let age = Number(document.getElementById("age").value); if (isNaN(age)) { voteable = "Input is not a number"; } else { voteable = (age < 18) ? "Too young" : "Old enough"; } document.getElementById("demo").innerHTML = voteable + " to vote"; } </script> </body> </html>
