1.使用while循环输出1,2,3,4,5,6, 8,9,10
#!/usr/bin/python3 n = 1
while n <= 10: if n != 7: print(n) else: pass n += 1
2.求1-100的所有数之和
#!/usr/bin/python3
n = 1 sum = 0 while n <= 100: sum += n n += 1 print(sum)
3.输出1—100内所有的奇数
#!/usr/bin/python3 n = 1 while n <= 100: if n % 2 != 0: print(n) else: pass n += 1
4.输出1—100内所有的偶数
#!/usr/bin/python3 n = 1 while n <= 100: if n % 2 == 0: print(n) else: pass n += 1
5.求1-2+3-4+5…99的所有数的和
#!/usr/bin/python3 n = 1 sum = 0 while n< 100: if n % 2 != 0: sum += n else: sum -= n n += 1 print(sum)
6.用户登录,三次重试机会
#!/usr/bin/python3 user_name = "admin" pwd = "123456" num = 1 while True: n1 = input("用户名:") n2 = input("密码:") if n1 == user_name and n2 == pwd: print("登陆成功!") break else: num += 1 if num == 4: print("3次用户名或者密码均有误!退出程序.") break
n = 1
while n <= 10: if n !=7: print(n) else: pass n += 1