Show Output
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>JavaScript Duplicate Parameter Name Not Allowed in Strict Mode</title> </head> <body> <script> "use strict"; function square(a, a) { // SyntaxError return a * a; } console.log(square(2, 2)); </script> <p><strong>Note:</strong> Please check out the browser console by pressing the f12 key on the keyboard.</p> </body> </html>
