基础练习No1 循环
1、使用while循环输入 1 2 3 4 5 6 8 9 10
1 count = 0 2 while count < 10: 3 count += 1 # count = count + 1 4 if count == 7: 5 continue 6 print(count)
输出 1-100 内的所有奇数
1 #方法一: 2 count = 1 3 while count < 101: 4 print(count) 5 count += 2 6 #方法二: 7 count = 1 8 while count < 101: 9 if count % 2 == 1: 10 print(count) 11 count += 1
求1-2+3-4+5 ... 99的所有数的和
1 sum = 0 2 count = 1 3 while count < 100: 4 if count % 2 == 0: 5 sum = sum - count 6 else: 7 sum = sum + count 8 count += 1 9 print(sum)
用户登陆(三次机会重试)
1 i = 0 2 while i < 3: 3 username = input('请输入账号:') 4 password = int(input('请输入密码:')) 5 if username == 'WuKongSir' and password == 123: 6 print('登录成功') 7 else: 8 print('登录失败请重新登录') 9 i += 1
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