python练习题

1、使⽤while循环输出 1 2 3 4 5 6 8 9 10

count = 1
while count <= 10 :
    if count == 7 :
        count +=1
        continue
    print(count,end=" ")
    count +=1
    num = 1  
while num <= 10 :
    print(num,end=" ")
    num += 1  #num + 1

2、求1-100的所有数的和

num = 1
h = 0
while num <= 100 :
    h = h + num
    num += 1
print(h)

3、输出 1-100 内的所有奇数

num = 1
while num <= 100 :
    if num % 2 == 1:
        print(num,end=" ")
    else:
        pass
    num +=1

4、输出 1-100 内的所有偶数

num = 1
while num <= 100 :
    if num % 2 == 0:
        print(num,end=" ")
    else:
        pass
    num +=1

5、求1-2+3-4+5 ... 99的所有数的和

num = 1
h = 0
while num < 100 :
    if num % 2 == 1:
        h = h + num
    else :
        h = h - num
    num +=1
print(h)

6、用户登陆（三次机会重试）

num = 1
name = "admin"
print("您有三次输入机会！")
while num <= 3:
    user = input("请输入用户名:")
    if user == name :
        print("登录成功！")
    elif num == 3:
        print("您的输入次数已用完，请确认用户名是否正确")
        break
    else:
        print("用户名不正确，请确认用户名是否正确")
    num += 1

PS:本文仅限个人练习记录，代码不具有任何代表性