<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <script> cars=["BMW","Volvo","Saab","Ford"]; for (var i=0;i<cars.length;i++){ document.write(cars[i] + "<br>"); } </script> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <p>点击按钮循环代码5次。</p> <button onclick="myFunction()">点击这里</button> <p id="demo"></p> <script> function myFunction(){ var x=""; for (var i=0;i<5;i++){ x=x + "该数字为 " + i + "<br>"; } document.getElementById("demo").innerHTML=x; } </script> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <script> cars=["BMW","Volvo","Saab","Ford"]; for (var i=0,l=cars.length; i<l; i++){ document.write(cars[i] + "<br>"); } </script> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <script> cars=["BMW","Volvo","Saab","Ford"]; var i=0,len=cars.length; for (; i<len; ){ document.write(cars[i] + "<br>"); i++; } </script> </body> </html>
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <p>点击下面的按钮,循环遍历对象 "person" 的属性。</p> <button onclick="myFunction()">点击这里</button> <p id="demo"></p> <script> function myFunction(){ var x; var txt=""; var person={fname:"Bill",lname:"Gates",age:56}; for (x in person){ txt=txt + person[x]; } document.getElementById("demo").innerHTML=txt; } </script> </body> </html>