实例说明Python中比较运算符的使用

2019-11-25 17:29:12

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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：

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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/pythona = 21b = 10c = 0if ( 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 <= b ):  print "Line 6 - a is either less than or equal to b"else:  print "Line 6 - a is neither less than nor equal to b"if ( b >= 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 bLine 2 - a is not equal to bLine 3 - a is not equal to bLine 4 - a is not less than bLine 5 - a is greater than bLine 6 - a is either less than or equal to bLine 7 - b is either greater than or equal to b

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