## 算數運算符 + - * / % 運算符 operator 5 + 6 表達式 組成 操作數和操作符，會有一定結果 | x = 5、y = 10 | 算數運算符 | 結果 | | --- | --- | --- | | x = 5、y = 10 | + | 15 | | x = 5、y = 10 | - | -5 | | x = 5、y = 10 | * | 50 | | x = 5、y = 10 | / | 0.5 | | x = 5、y = 10 | % | 5 | | x = 5、y = 0 | / | Infinity | | x = 5、y = 0 | % | NaN | 示例： ~~~ var x = 5; var y = 10; console.log(x + y); //：15 console.log(x - y); //：-5 console.log(x * y); //：50 console.log(x / y); //：0.5 console.log(x % y); //：5 console.log(x / 0); //：Infinity 無窮大 console.log(x % 0); //：NaN 非數值 ~~~ 效果：