python-练习1

#1.while使用while循环输入1 2 3 4 5 6   8 9 10
'''count = 0
while count<10:
    count += 1
    if count == 7:
        continue
    else:
        print(count)'''
#2.while求1-100的和
'''count=1
sum=0
while count<101:
    sum+=count
    count+=1
print(sum)'''
#3.输出1-100内所有的奇数
#方法一:
'''count=1
while count<101:
    print(count)
    count+=2'''
#方法二:
'''count=1
while count<101:
    if count%2 == 1:
        print(count)
    count+=1'''
#4.输出1-100内所有偶数与上面方法相同
#5.求1-2+3-4+5...99的所有数的和
'''count=1
sum=0
while count<100:
    if count%2==1:
        sum+=count
    else:
        sum-=count
    count+=1
print(sum)'''
#6.用户登陆(三次机会重试)
'''i=0
while i<3:
    username=input("请输入账号:")
    password=input("请输入密码:")
    if username=='orange' and password=='123':
        print('登陆成功')
        break
    else:
        if i != 2:
            print('登陆失败还有'+str(2-i)+'次机会')
        else:
            print('登陆失败')
    i+=1'''