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。