python练习题-day1

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

sum=0
for i in range(101):
    sum+=i
print(sum)

li=[]
for i in range(1,101):
    if i%2==1:
        li.append(i)
print(li)

li=[]
for i in range(1,101):
    if i%2==0:
        li.append(i)
print(li)

sum=0
for i in range(100):
    if i %2 ==0:
        sum-=i
    if i%2==1:
        sum+=i
print(sum)

#方法2
sum=0
j=1
for i in range(1,100):
    sum+=i*j
    j=-j
print(sum)

count=0
while True:
    uname="myfu"
    password="123"
    u,p=input("input your name and password:").split()
    count+=1
    if uname ==u and password ==p:
        exit("login success")
    else:
        if count==3:
            exit("three times error input,your count is locked")
        else:
            print("error username or password ,pls try again,%s time last"%(3-count))