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Python比较运算符

2024-05-02 08:49:03 356

这些运算符比较它们两侧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持有10，变量b持有20，则-

序号运算符和说明例1==
如果两个操作数的值相等，则条件变为true。
（a==b）不正确。2！=
如果两个操作数的值不相等，则条件为true。
（a！=b）是正确的。3<>
如果两个操作数的值不相等，则条件为true。
（a<>b）是正确的。这类似于！=运算符。4>
如果左操作数的值大于右操作数的值，则条件为true。
（a>b）是不正确的。5<
如果左操作数的值小于右操作数的值，则条件为true。
（a<b）是正确的。6>=
如果左操作数的值大于或等于右操作数的值，则条件为true。
（a>=b）不正确。7<=
如果左操作数的值小于或等于右操作数的值，则条件为true。
（a<=b）是正确的。

示例

假设变量a持有10，变量b持有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"

输出结果

当您执行上述程序时，它将产生以下结果-

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

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Python比较运算符

示例

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