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。
原文：http://www.jb51.net/article/66749.htm