赋值运算符

概念：用来把数据赋值给变量的运算符

 

 

var num = 10;
    //num = num + 1;  num++
    //num = num + 2; //num +=2;
    //num += 2;
    num += 5;
    console.log(num);
    var age = 3;
    age *= 2;
    console.log(age);