10-变量的提前声明

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      console.log(a)//?
      a();//?
      var a =3;
      function a(){
        console.log(10);
      }
      console.log(a);//?
      a = 6;
      a();//?

图一.jpg

    console.log(a);
    var a = "孙悟空";
    function a(){
       console.log("猪八戒");
     }