What wrong with code?

Question

n=int(input('n:'))
#1*n+2*(n-1)
k=1
while k>n:
sum(k*n)
k+=1
n-=1
print(sum)

Answer 1

Ohh... just replace the line sum=k*n with sum=sum+k*n
It will sum over all terms.

Answer 2

n=int(input('n:'))
#1*n+2*(n-1)
k=1
sum=0
while k<n:
sum=k*n
k+=1
n-=1
print(sum)

I think this is the right code.

Answer 3

I'm needed to calculate sum of these 1*n+2*(n-1).... While n not be a > first factor

Answer 4

There is no function called "sum".