Python练习代码

Posted 2021-01-11 yuan-g

1-100所有数字的和

count = 1
sum = 0
while count <= 100:
    sum = sum + count
    count += 1
print(sum)

输出1-100内的所有奇数

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

输出1-100内所有的偶数

count = 1
num = 0
while count <= 100:
    count += 1
    num += 1
    if num%2 == 0:
        print(num)

求1-2+3-4+5...99的和

count = 1
num = 1
sum = 0
while count <= 99:
    if num%2 == 0:
        num = -num        #判断奇数偶数，奇数为正，偶数为负
    else:
        num = num
    sum = sum + num
    count += 1
    num += 1
print(sum)

使用while循环输入1 2 3 4 5 6 8 9 10

count = 1
num = 0
while count < 10:
    count += 1
    num += 1
    if num == 7:continue
    else:print(input(‘请输入数字‘+str(num)))

 用户登录（三次机会重试）

count = 1
while count <= 3:
    ID = input(‘请输入账号:‘)
    Password = input(‘请输入密码:‘)
    count += 1
    if ID == ‘关元最帅‘ and Password == ‘无敌帅‘:
        print(‘登陆成功‘)
        break
    elif count <= 3:
        print(‘登陆失败,还有‘ + str(4-count) + ‘次机会‘)
    else:
        print(‘登陆失败超过三次‘)