1、使用while循环输入1 2 3 4 5 6 8 9 10
n = 0 while n < 11: n = n + 1 if n == 7: continue print(n)
n = 0 while n < 11: n = n + 1 if n == 7: pass else: print(n)
2、输出1-100内的所有奇数
count = 1 while count < 101: if count % 2 == 1: print(count) count += 1
3、求1-100的所有数的和
n = 1 count = 0 while n < 101: count += n n += 1 print(count)
四、求1-2+3-4+5...+99
count = 1 sum = 0 while count < 100: if count % 2 == 0: sum -= count else: sum += count count += 1 print(sum)
五、用户登录(三次机会重试)
i = 0 while i < 3 : username = input("请输入账号:") password = int( input("请输入密码:")) if username == "咸鱼哥" and password == 123: print('登录成功') else: print('登录失败请重新登录') i += 1
i = 0 while i < 3: username = input("请输入账号:") password = input("请输入密码:") if username == "wws" and password == '123': print('登录成功') break else: print('登录失败,您还有 %s 次机会,请重新登录' %(2-i)) i += 1
用户登录