Python总结1

(1)1+2+3+......+99+100算法：

1 number_1=1
2 summation=0
3 print('1+2+3+......+99+100=')
4 while number_1<=100:
5     summation=summation+number_1
6     number_1=number_1+1
7 print(summation)

(2)1到100 内的奇偶数：

#算法1
odd_number=1
print('1到100内所有的奇数为：')
while odd_number<=100:
    print(odd_number)
    odd_number+=2
even_number=2
print('1到100内所有的偶数为：')
while even_number<=100:
    print(even_number)
    even_number+=2
#算法2
natural_number=1
print('1到100内所有的奇数为：')
while natural_number<=100:
    if natural_number%2==1:
        print(natural_number)
        natural_number+=1
    else :
        natural_number+=1
natural_number=1
print('1到100内所有的偶数为：')
while natural_number<=100:
    if natural_number%2==0:
        print(natural_number)
        natural_number+=1
    else :
        natural_number+=1
    

(3)用户登录程序（三次机会）：

try_times=3
variate=0
while try_times>0:
    user_id=input('请输入你的用户名:')
    user_password=input('请输入你的密码:')
    if user_id=='野猪':
        if user_password=='123':
            print('登陆成功')
            try_times=0
            variate=1
        else:
            try_times-=1
            print('用户名或密码错误，你还有',try_times,'次机会')
    else :
        try_times-=1
        print('用户名或密码错误，你还有',try_times,'次机会')
if variate==0:
    print('您的尝试次数已经用尽')
else :
    pass

(4)身份证生日&性别提取：

id_number=input('请输入你的身份证号:')
print('你的生日为',id_number[6:10],'年',id_number[10:12],'月',id_number[12:14],'日')
if int(id_number[-2])%2==1:
    print('性别：男')
else :
    print('性别：女')

(5)1-2+3-4......+99-100算法:

#算法1
odd_number=1
even_number=-2
result_1=0
print('1-2+3-4......+99-100=')
while odd_number<=100:
    result_1=result_1+odd_number+even_number
    odd_number+=2
    even_number-=2
print(result_1)
#算法2
number=1
result_2=0
print('1-2+3-4......+99-100=')
while number<=100:
    result_2=result_2-1
    number+=2
print(result_2)