1、数学运算符

+ - * /                   // 数学运算加、减、乘、除

%                         //取余数,例:3%2为求3除以2的余数

+=                         //例:a+=b,相当于a=a+b,还有 -=    *=

++                         //例:a++,相当于a=a+1,还有  --

2、逻辑运算符

&&                       //并

||                         //或

!                         //非

3、比较运算符

==                       //等于

!=                       //不等于

>                        //大于

<                        //小于

>=                       //大于等于

<=                       //小于等于

4、其他

+                       //用于字符串的拼接,例:"pin"+"jie"=="pinjie"