What's wrong?

Question

No one likes homework, but your math teacher has given you an assignment to find the sum of the first N numbers.

Let’s save some time by creating a program to do the calculation for you!

Take a number N as input and output the sum of all numbers from 1 to N (including N).

Sample Input
100

Sample Output
5050

Explanation: The sum of all numbers from 1 to 100 is equal to 5050.
Solution:
N = int(input())
sum=0
for i in range(1,N+1,1):
sum+=i
print(sum)

Answer 1

N = int(input())
sum=0
for i in range(1, N+1):
sum+=i
print(sum)

Answer 2

sum = (n*(n+1)/2) 🙄