# Python比较运算符示例

`==` 如果两个操作数的值相等，则条件为真。 `(a == b)`求值结果为 `false`
`!=` 如果两个操作数的值不相等，则条件为真。 `(a != b)`求值结果为 `true`
`>` 如果左操作数的值大于右操作数的值，则条件成为真。 `(a > b)`求值结果为 `false`
`<` 如果左操作数的值小于右操作数的值，则条件成为真。 `(a < b)`求值结果为 `true`
`>=` 如果左操作数的值大于或等于右操作数的值，则条件成为真。 `(a >= b)`求值结果为 `false`
`<=` 如果左操作数的值小于或等于右操作数的值，则条件成为真。 `(a <= b)`求值结果为 `true`

## 实例

``#!/usr/bin/python3  #coding=utf-8  # save file : comparison_operators_example.py    a = 21  b = 10    if ( a == b ):     print ("Line 1 - a is equal to b")  else:     print ("Line 1 - a is not equal to b")    if ( a != b ):     print ("Line 2 - a is not equal to b")  else:     print ("Line 2 - a is equal to b")    if ( a < b ):     print ("Line 3 - a is less than b" )  else:     print ("Line 3 - a is not less than b")    if ( a > b ):     print ("Line 4 - a is greater than b")  else:     print ("Line 4 - a is not greater than b")    a,b=b,a #values of a and b swapped. a becomes 10, b becomes 21    if ( a <= b ):     print ("Line 5 - a is either less than or equal to  b")  else:     print ("Line 5 - a is neither less than nor equal to  b")    if ( b >= a ):     print ("Line 6 - b is either greater than  or equal to b")  else:     print ("Line 6 - b is neither greater than  nor equal to b")  ``

``F:worksppython>python comparison_operators_example.py  Line 1 - a is not equal to b  Line 2 - a is not equal to b  Line 3 - a is not less than b  Line 4 - a is greater than b  Line 5 - a is either less than or equal to  b  Line 6 - b is either greater than  or equal to b  ``