lovecoding
/
Java0715


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        var arr = ["apple", "orange", "banana"]
        for (var i = 0; i < arr.length; i++) {
            console.log(arr[i])
        }
        // Array也可以看做是对象
        // 此时元素的索引被看做是对象的属性
        for(var i in arr){
            console.log(i)
            console.log(arr[i])  
        }
        // 和java中的增强for循环 有较大不同

        var person = {
            // 格式： 属性名：属性值, 属性名：属性值
            "name": "张三",
            "age": 20,
            "interests": ["篮球", "足球", "乒乓球"],
            "info": function(){
                console.log(this.name + "的年龄" + this.age + ",喜欢的运动有：")
                // 对数组元素的遍历
                for (var i = 0; i < this.interests.length; i++) {
                    console.log(this.interests[i])
                }
            }
        }
        // 对象其实是一种key value的形式
        for(var key in person){
            console.log(key)
        }
        // 过滤掉继承获取的属性
        for(var key in person){
            if(person.hasOwnProperty(key)){
                console.log(key)
            }
        }

        // while
        var n = 10
        while(n > 0){
            n = n - 2
        }
        console.log(n)
    </script>
</head>

<body>
    Hi For
</body>

</html>