| 下表列出了所有Python语言支持的逻辑运算符。假设变量a持有10和变量b持有20，则：
示例:
试试下面的例子就明白了所有的Python编程语言提供了逻辑运算符：
#!/usr/bin/python
a = 10
b = 20
c = 0
if ( a and b ):
print "Line 1 - a and b are true"
else:
print "Line 1 - Either a is not true or b
is not true"
if ( a or b ):
print "Line 2 - Either a is true or b is
true or both are true"
else:
print "Line 2 - Neither a is true nor b is
true"
a = 0
if ( a and b ):
print "Line 3 - a and b are true"
else:
print "Line 3 - Either a is not true or b
is not true"
if ( a or b ):
print "Line 4 - Either a is true or b is
true or both are true"
else:
print "Line 4 - Neither a is true nor b is
true"
if not( a and b ):
print "Line 5 - Either a is not true or b
is not true"
else:
print "Line 5 - a and b are true" |
当执行上面的程序它会产生以下结果：
Line 1 - a and b are true
Line 2 - Either a is true or b is true or both are true
Line 3 - Either a is not true or b is not true
Line 4 - Either a is true or b is true or both are true
Line 5 - Either a is not true or b is not true |
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