Python 比较运算符
pythonserver side programmingprogramming
这些运算符比较它们两边的值并确定它们之间的关系。它们也称为关系运算符。
假设变量 a 保存 10，变量 b 保存 20，则 −
| Sr.No | 运算符 &描述 | 示例 |
|---|---|---|
| 1 | == 如果两个操作数的值相等，则条件为真。 | (a == b) 不为真。 |
| 2 | != 如果两个操作数的值不相等，则条件为真。 | (a != b) 为真。 |
| 3 | <> 如果两个操作数的值不相等，则条件为真。 | (a <> b) 为真。这与 != 运算符类似。 |
| 4 | > 如果左操作数的值大于右操作数的值，则条件为真。 | (a > b) 不为真。 |
| 5 | < 如果左操作数的值小于右操作数的值，则条件为真。 | (a < b) 为真。 |
| 6 | >= 如果左操作数的值大于或等于右操作数的值，则条件为真。 | (a >= b) 不为真true。 |
| 7 | <= 如果左操作数的值小于或等于右操作数的值，则 条件为真。 | (a <= b) 为真。 |
示例
假设变量 a 保存 10，变量 b 保存 20，则 −
#!/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 <= 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"
输出
当您执行上述程序时，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
