01、python的基础-->while循环应用

1、简单的输出小程序

name = input('请输入你的名字：')
age = input('请输入你的年龄：')
print('我的名字叫'+name,'我今年'+ age + '岁')

2、while循环的简单小程序（1-100求和）

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

3、while循环的简单小程序（输出1-100）

count = 1
flag = True
while flag :
    print (count)
    count = count + 1
    if count > 100 :
        flag = False

4、输出1 2 3 4 5 6   8 9 10

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

或

count = 0
while count < 10:
    count += 1
    if count == 7:
        continue
    print(count)

5、输出100以内的奇数

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

或

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

6、输出 1-2+3-4...99的值

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

7、用户三次登录 （input）

i = 0
while i < 3:
    username = input('请输入用户名：')
    password = int(input('请输入密码：'))
    if username == '小明' and password == 123:
        print('登陆成功')
    else:
        print('登陆失败，请重新输入密码')
    i += 1