源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <h1>JavaScript Loops</h1> <p id="demo"></p> <script> var text = ""; var i; for (i = 0; i < 5; i++) { text += "The number is " + i + "<br>"; } document.getElementById("demo").innerHTML = text; </script> </body> </html>
运行结果