练习1

Posted 2020-10-21 python052044

# 1、使用while循环输入 1 2 3 4 5 6     8 9 10
‘‘‘
count=1
while count<=10:
    if count==7:
        print( )
        count=count+1
        continue
    print(count)
    count=count+1
‘‘‘
# 2、求1-100的所有数的和
‘‘‘
sum=0
count=1
while count<=100:
    sum=sum+count
    count=count+1
print(sum)
‘‘‘
# 3、输出 1-100 内的所有奇数
‘‘‘
odd=1
while odd<=100:
    if odd % 2==0:
        odd=odd+1
        continue
    print(odd)
    odd=odd+1
‘‘‘
‘‘‘
odd=1
while odd<=100:
    if odd%2==1:
        print(odd)  
    odd=odd+1
‘‘‘

# 4、输出 1-100 内的所有偶数
‘‘‘
even=1
while even<=100:
    if even%2==1:
        even=even+1
        continue
    print(even)
    even=even+1     
‘‘‘
‘‘‘
even=1
while even<=100:
    if even%2==0:
        print(even)
    even=even+1
‘‘‘
# 5、求1-2+3-4+5 ... 99的所有数的和
‘‘‘
sum=1
count=2
while count<=99:
    sum=sum-count
    count=count+1
    sum=sum+count
    count=count+1
print(sum)
‘‘‘
   

# 6、用户登陆（三次机会重试）
‘‘‘
username="ABC"
password="123"
i=1
while i<=3:
    name=input(‘请输入账号：‘)
    word=input(‘请输入密码：‘)
    if name==‘ABC‘ and word==‘123‘:
        print(‘登录成功‘)
        break
    elif i<=2:
        print(‘登录失败，还有‘+str(3-i)+‘次机会‘)
        i=i+1
        continue
    else :
        print(‘登陆失败，不能登录‘)
        break
‘‘‘
‘‘‘
username="ABC"
password="123"
i=1
while i<=3:
    name=input(‘请输入账号：‘)
    word=input(‘请输入密码：‘)
    if name==‘ABC‘ and word==‘123‘:
        print(‘登录成功‘)
        break
    elif i==3:
        print(‘登陆失败，不能登录‘)
        break
    print(‘登录失败，还有‘+str(3-i)+‘次机会‘)
    i=i+1
‘‘‘