Python基础一

使用while循环输入 123456 89 10

#count计数
count = 0
while count <10:
    count += 1 #count = count +1
    if count == 7:
        print('')
    else:
        print(count)

代码运行

输入1234568910中间无空格

count = 0
while count <10:
    count += 1 #count = count +1
    if count == 7:
        continue # 或者用pass 跳过
    else:
        print(count)

代码运行

求一到100所有数的和

方法1

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

代码运行

方法2 用for进行遍历

输出1-100所有奇数

count = -1
while count <98:
    count=count +2
    print(count)

方法2

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

代码运行

输出1-100内的所有偶数

count = 0
while count <= 98:
    count = count +2
    print(count)

代码运行

求1-2+3-4+5。。。99的所有数的和

count = 0
sum = 0
while count <99:
    count +=1
    if count % 2 ==0:
        sum=sum-count
    else:
        sum += count
print (sum)

代码运行

用户登录三次机会重试

a = 0

while a<3:
    a += 1
    username = input('请输入账户：')
    password = int(input('请输入密码：'))
    if username=='路飞' and password == 123:
        print('登陆成功')
    else:
        print('请重新登陆')

代码运行