数组之运算法则

开发工具与关键技术：DW    MVC

作者：陈芝番

撰写时间：2019.4.13

数组：

Map                映射              一个对一个

Reduce              汇总               一堆出来一个

Filter               过滤器

Foreach             循环

1.加法：+

    <script src="browser.js" charset="utf-8"></script>

    <script type="text/babel">

    let a=590;

    let b=5;

     let c=5；

    console.log(a+b+c);

  输出值：

</script>

<script src="browser.js" charset="utf-8"></script>

    <script type="text/babel">

         var a= 590;

         var b= 5;

         var c= 5;

console.log(a+b+c)

   </script>

输出值：

2.除法：/

<script src="browser.js" charset="utf-8"></script>

    <script type="text/babel">

        let a =81;

         let b =9;

         let c =3;

         console.log(a/b/c)

         </script>

输出值：

<script src="browser.js" charset="utf-8"></script>

    <script type="text/babel">

         var a =81;

         var b =9;

         var c =3;

         console.log(a/b/c)

    </script>

输出值:

3．乘法：*

<script src="browser.js" charset="utf-8"></script>

    <script type="text/babel"> 
         let a =3;

         let b =3;

         let c =3;

         console.log(a*b*c)

输出值：

 

<script src="browser.js" charset="utf-8"></script>

    <script type="text/babel">

         var a =3;

         var b =3;

         var c =3;

         console.log(a*b*c)

    </script>

输出值：

4.混合：+  -  *  /

<script src="browser.js" charset="utf-8"></script>

    <script type="text/babel">

 

         let a =5;

         let b =5;

         let c =5;
    console.log(a*b/c)

    </script>

输出值：

<script src="browser.js" charset="utf-8"></script>

    <script type="text/babel">

         var a =5;

         var b =5;

         var c =5;

         console.log(a*b/c)

         </script>

输出值：