实例

fruits = ["Banana", "Orange", "Apple", "Mango"];

var first = fruits[0];

访问最后一个数组元素

fruits = ["Banana", "Orange", "Apple", "Mango"];

var last = fruits[fruits.length - 1];

var fruits, text, fLen, i;

fruits = ["Banana", "Orange", "Apple", "Mango"];

fLen = fruits.length;

text = "<ul>";

for （i = 0; i < fLen; i++） {

     text += "<li>" + fruits[i] + "</li>";

} 

var fruits, text;

fruits = ["Banana", "Orange", "Apple", "Mango"];

text = "<ul>";

fruits.forEach（myFunction）;

text += "</ul>";

function myFunction（value） {

  text += "<li>" + value + "</li>";

}

var fruits = ["Banana", "Orange", "Apple", "Mango"];

fruits.push（"Lemon"）;                // 向 fruits 添加一个新元素 （Lemon）

var fruits = ["Banana", "Orange", "Apple", "Mango"];

fruits[fruits.length] = "Lemon";     // 向 fruits 添加一个新元素 （Lemon）

var fruits = ["Banana", "Orange", "Apple", "Mango"];

fruits[6] = "Lemon";                 // 向 fruits 添加一个新元素 （Lemon）