--- title: 賦值運算子 tags: JS實戰 description: --- 賦值運算子 === ### += ```javascript= let a = 2; a = a + 1; //將變數a加1，再賦予給變數a console.log(a); // a為3 ``` 可將第二行改寫為 ```javascript=2 a += 1; //等同a = a + 1; console.log(a); // a為3 ``` <br> ### -= 、 *= 、 /= ```javascript= let a = 4; a -= 2; // a = a - 2 a *= 2; // a = a * 2 a /= 2; // a = a / 2 console.log(a); // a為2 ```