本文实例讲述了Python实现求最大公约数及判断素数的方法。分享给大家供大家参考。具体实现方法如下：

#!/usr/bin/env python def showMaxFactor(num): count = num / 2 while count > 1: if num % count == 0: print 'largest factor of %d is %d' % (num, count) break #break跳出时会跳出下面的else语句 count -= 1 else: print num, "is prime" for eachNum in range(10,21): showMaxFactor(eachNum)

运行结果如下：

largest factor of 10 is 5 11 is prime largest factor of 12 is 6 13 is prime largest factor of 14 is 7 largest factor of 15 is 5 largest factor of 16 is 8 17 is prime largest factor of 18 is 9 19 is prime largest factor of 20 is 10

希望本文所述对大家的Python程序设计有所帮助。