編輯代碼:
查看結果 »
試一試 - ©
w3ii.com
<!DOCTYPE html> <html> <body> <h1>JavaScript Variables</h1> <p>If you re-declare a JavaScript variable, it will not lose its value.</p> <p id="demo"></p> <script> var carName = "Volvo"; var carName; document.getElementById("demo").innerHTML = carName; </script> </body> </html>