源代碼
點擊運行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>教程</title> </head> <body> <h2>JavaScript let</h2> <p id="demo"></p> <script> var i = 5; for (let i = 0; i < 10; i++) { // 一些代碼... } document.getElementById("demo").innerHTML = i; </script> </body> </html>
運行結果