python的数学计算

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：

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/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

>>> c = 0
>>> for i in xrange(101):
... c = c + i
...
>>> print c
5050
>>>