用来把数据运算符给变量的运算符

赋值运算符

说明

案例

=

直接赋值

var usrName='我是值'

+=、-=

加、减一个数之后在赋值

var age = 10;age+=5;//15

*=、/=、%=

乘、除、取模 后在赋值

var age = 2 ;age *=5;//10

<script>
    var num = 10;
    num += 10; //相当于num = num + 10
    num -= 5; //相当于num = num -5
    num *= 2; //相当于num = num *2
    num /= 5; //相当于num = num / 5
  </script>