js中的数组简介（一）
名词解释两种创建数组的方式以及有什么区别数组添加和删除的4个API方法
<!DOCTYPE html
>
<html
>
<head
>
<meta charset
="UTF-8">
<title
>数组介绍
</title
>
<script type
="text/javascript">
var arr1
= new Array(1,2,3);
var arr2
= [3,2,1];
console
.log(arr1
)
console
.log(arr2
)
console
.log(typeof arr2
);
var arr3
= new Array(10);
var arr4
= [10];
console
.log(arr3
)
console
.log(arr4
)
var arr
= ["张三","李四","王五","赵六"];
console
.log(arr
)
arr
.push("哈哈");
console
.log(arr
)
var item
= arr
.pop();
console
.log(item
);
console
.log(arr
)
arr
.unshift("小二")
console
.log(arr
)
var item
= arr
.shift()
console
.log(item
);
console
.log(arr
)
</script
>
</head
>
<body
>
</body
>
</html
>
