To find the sum of n consecutive number from 1

Question

N = int(input())
#your code goes here
sum=int((N*(N+1))/2)
print(sum)

This is my program I have got the desired result but I want to do with the loop statement ( for an while) I was unable to get it

Can anyone help me?

Answer 1

Just wanted to remind you not to use built-in function name (sum) for your variable name 👌

Answer 2

total = 0
for n in range(1, N+1):
total += n

print(total)

this should do the job

Answer 3

Thank you

Answer 4

Nishant Kumar Your code O(1) will be much more efficient than using a loop O(N), but there are plenty of good examples here for you to choose from if you want to use a loop for practice. Also, as Ipang suggests, don't use built-in names for your variables as it will overwrite the use of those names and may cause future bugs and errors in your code.