Python实现求最大公约数及判断素数的方法

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。