第3章 第341节 Python 练习实例47

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Python 练习实例47

题目:两个变量值互换。

程序分析:

实例

#!/usr/bin/python
# -*- coding: UTF-8 -*-

def exchange(a,b):
    a,b = b,a
    return (a,b)

if __name__ == '__main__':
    x = 10
    y = 20
    print 'x = %d,y = %d' % (x,y)
    x,y = exchange(x,y)
    print 'x = %d,y = %d' % (x,y)

以上实例输出结果为:

x = 10,y = 20
x = 20,y = 10