Python练习1

#!/usr/bin/python33#coding=utf-8#由1-4组成，能组成多少个互不相同且无重复数字的三位数？都是多少？for i in range(1,5):for j in range(1,4):for k in range(1,4):if i != j and j !=k and i != k:num = i * 100 + j*10 +kprint(num)