假设变量a的值是10，变量b的值是21，则 -
| 运算符 | 描述 | 示例 |
|---|---|---|
+ |
加法运算，将运算符两边的操作数增加。 | a + b = 31 |
- |
减法运算，将运算符左边的操作数减去右边的操作数。 | a – b = -11 |
* |
乘法运算，将运算符两边的操作数相乘 | a * b = 210 |
/ |
除法运算，用右操作数除左操作数 | b / a = 2.1 |
% |
模运算，用右操作数除数左操作数并返回余数 | b % a = 1 |
** |
对运算符进行指数(幂)计算 | a ** b，表示10的21次幂 |
// |
地板除 - 操作数的除法，其结果是删除小数点后的商数。 但如果其中一个操作数为负数，则结果将被保留，即从零(向负无穷大)舍去 | 9//2 = 4 ， 9.0//2.0 = 4.0, -11//3 = -4, -11.0//3 = -4.0 |
实例
假设变量a的值是10，变量b的值是21，参考以下代码实现 -
#!/usr/bin/python3
#coding=utf-8
# save file : arithmetic_operators_example.py
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)
将上面代码保存到文件： arithmetic_operators_example.py 中，执行结果如下 -
F:\worksp\python>python arithmetic_operators_example.py
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 2.1
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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