基础练习

基础练习

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

2. 求1-100的所有数的和

sum = 0
for i in range(101):
    sum += i
print(sum)

3. 输出 1-100 内的所有奇数

   for i in range(1, 101):
       if i % 2 == 1:
           print(i, end=" ")
   

4. 输出 1-100 内的所有偶数

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

5. 求1-2+3-4+5 ... 99的所有数的和

while count < 100:

    if count % 2 == 0:
        sum -= count
        count += 1
        continue
    sum += count
    count += 1
print(sum)

6. 用户登陆（三次机会重试）

user = "randysun"
pwd = "123456"

count = 0
while count < 3:
    user_in = input("请输入账户：")
    pwd_in = input("请输入密码：")
    if user_in == user and pwd == pwd:
        print("登录成功")
        break
    else:
        print("账户或密码错误")
    count += 1
    if count == 3:
        print("你没有机会了")

7. 猜年龄游戏要求： 允许用户最多尝试3次，3次都没猜对的话，就直接退出，如果猜对了，打印恭喜信息并退出

   age = 18
   
   for i in range(3):
       age_in = input("请输入您猜的年龄:")
       age_in = int(age_in)
       if age_in == age:
           print("恭喜下你猜对了！")
           break
   

8. 猜年龄游戏升级版,要求： 允许用户最多尝试3次 每尝试3次后，如果还没猜对，就问用户是否还想继续玩，如果回答Y或y,就继续让其猜3次，以此往复，如果回答N或n，就退出程序 如何猜对了，就直接退出

age = 18
count = 0

while True:
    age_in = input("请输入您猜的年龄:")
    age_in = int(age_in)
    if age_in == age:
        print("恭喜下你猜对了！")
        break
    count += 1
    if count == 3:
        print("三次机会已用完!")
        res = input("继续玩输入Y或y,不想玩请输入N或n:")
        if res == "Y" or res == "y":
            count = 0;
        elif res == "N" or res == "n":
            break

9. for循环打印99乘法表

for i in range(1, 10):
    for j in range(1, i+1):
        print(f"{j} * {i} = {i * j}", end="\t")
    print()

10. for循环打印金字塔:如下

           *
          ***
         *****
        *******
       *********
    

    for i in range(1, 6):
        print(f'{"*" * (2 * i - 1): ^10}')