In [1]:

    

n=int(input('please enter a positive ingeter'))
i=1
total=0
while i<=n:
    a=int(input())
    total=total+a
    i=i+1
print(total)


    

    




please enter a positive ingeter5
1
2
3
4
5
15

In [6]:

    

input('if you don not want to enter anymore,please click Enter')
i=input()
while i!='':
    i=input()


    

    




if you don not want to enter anymore,please click Enter1
2
3

In [ ]:

    

i=int(input())
add_total=i
multi_total=i
while add_total>=i or multi_total>=(i*i):
    i=int(input())
    add_total=add_total+i
    multi_total=multi_total*i