实例说明python中比较运算符的使用

下表列出了所有python语言支持的比较操作符。假设变量a持有10和变量b持有20,则:

2015513120032469.jpg (585×480)

例如:

试试下面的例子就明白了所有的python编程语言提供的比较操作符:

#!/usr/bin/python
a = 21
b = 10
c = 0
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 not equal to b”
else:
print “line 3 – a is equal to b”
if ( a < b ): print "line 4 - a is less than b" else: print "line 4 - a is not less than b" if ( a > b ):
print “line 5 – a is greater than b”
else:
print “line 5 – a is not greater than b”
a = 5;
b = 20;
if ( a = a ):
print “line 7 – b is either greater than or equal to b”
else:
print “line 7 – b is neither greater than nor equal to b”

当执行上面的程序它会产生以下结果:

line 1 – a is not equal to b
line 2 – a is not equal to b
line 3 – a is not equal to b
line 4 – a is not less than b
line 5 – a is greater than b
line 6 – a is either less than or equal to b
line 7 – b is either greater than or equal to b

Posted in 未分类