发布时间:2019-09-15 09:55:57编辑:auto阅读(1674)
1.使用while循环输入1 2 3 4 5 6 8 9 10
#!/usr/bin/env python #-*- coding:utf-8 -*- a = 0 while True: a += 1 if a == 7: continue print(a) if a == 10: break
2.求1-100的所有数的和
#!/usr/bin/env python #-*- coding:utf-8 -*- sum = 0 start = 1 while True: sum = sum + start if start == 100: break start += 1 print(sum)
3.输出1-100内的所有奇数
#!/usr/bin/env python #-*- coding:utf-8 -*- start = 1 while True: if start % 2 == 1: print(start) start += 1 if start > 100: break
4.输出1-100内的所有偶数
#!/usr/bin/env python #-*- coding:utf-8 -*- start = 1 while True: if start % 2 == 0: print(start) start += 1 if start > 100: break
5.求1-2+3-4+5..99的所有数的和
#!/usr/bin/env python #-*- coding:utf-8 -*- start = 1 sum = 0 while start < 100: if start % 2 == 1: sum = sum + start else: sum = sum - start start += 1 print(sum)
显示等式验证方法:
#!/usr/bin/env python #-*- coding:utf-8 -*- s = "" start = 1 sum = 0 while start < 100: if start % 2 == 1: if start == 1: s = str(start) else: s = s + "+" + str(start) sum = sum + start else: s = s + "-" + str(start) sum = sum - start start += 1 print(s) print(sum
)
6.用户登陆(三次机会重试)
i = 1 while i < 4: user = raw_input("UserName:") pwd = raw_input("PassWord:") if user == "alex" and pwd == "123": print("true") break else: print("flase") i += 1
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