发布于 2015-06-21 10:25:01 | 92 次阅读 | 评论: 0 | 来源: 网络整理
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 |
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/python
a = 21
b = 10
c = 0
c = a + b
print "Line 1 - Value of c is ", c
c = a - b
print "Line 2 - Value of c is ", c
c = a * b
print "Line 3 - Value of c is ", c
c = a / b
print "Line 4 - Value of c is ", c
c = a % b
print "Line 5 - Value of c is ", c
a = 2
b = 3
c = a**b
print "Line 6 - Value of c is ", c
a = 10
b = 5
c = 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