javascript中函数的写法

2018-10-29 15:27:36来源：博客园阅读 ()

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    <title>Document</title>
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    <script>
        //js函数的书写

        function myFunction() {

            console.log("你好");
        }
//左边是funcion关键字 后面是函数名，里面写表达式

//带参数的两种写法 
//1.在函数里面写实参
        function myFunction(num,time,action) {
            var num=7,time="点",action="起床";
            console.log(num + time + action);
        }
//2.在调用函数的时候写实参
        function myFunction(num,time,action) {
            
            console.log(num + time + action);
        }
       myFunction("7", "点","起床");

//带返回值写法 
   
     function myFunction(a,b){
        var a=5,b=6;
        return a+b;
     }
//外面接受返回值
     function  num(a,b) {

        return  c=a+b;
    }
     var z=num(7,8); //通过=把return的值获取到
     console.log(z); 

    </script> 
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