下表列出了所有Python语言支持的算术运算符。假设变量a持有10和变量b持有20，则：
| 运算符 | 描述 | 实例 |
|---|---|---|
| + | 加法 - 对操作符的两侧加值 | a + b = 30 |
| - | 减法 - 从左侧操作数减去右侧操作数 | a - b = -10 |
| * | 乘法- 相乘运算符两侧的值 | a * b= 200 |
| / | 除 - 由右侧操作数除以左侧操作数 | b / a = 2 |
| % | 模 - 由右侧操作数和余返回除以左侧操作数 | b % = 0 |
| ** | 指数- 执行对操作指数(幂)的计算 | a**b = 10 幂为 20 |
| // | 地板除 - 操作数的除法，其中结果是将小数点后的位数被除去的商。 | 9//2 = 4 而 9.0//2.0= 4.0 |
例子:
试试下面的例子就明白了所有的Python编程语言提供了算术运算符：
#!/usr/bin/pythona = 21b = 10c = 0c = a + bprint "Line 1 - Value of c is ", c c = a - bprint "Line 2 - Value of c is ", c c = a * bprint "Line 3 - Value of c is ", c c = a / bprint "Line 4 - Value of c is ", c c = a % bprint "Line 5 - Value of c is ", c a = 2b = 3c = a**b print "Line 6 - Value of c is ", c a = 10b = 5c = a//b print "Line 7 - Value of c is ", c
当执行上面的程序，它会产生以下结果：
Line 1 - Value of c is 31 Line 2 - Value of c is 11 Line 3 - Value of c is 210 Line 4 - Value of c is 2 Line 5 - Value of c is 1 Line 6 - Value of c is 8 Line 7 - Value of c is 2
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