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

Answer 1

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

Answer 2

print(sum(range(int(input())+1)))

Answer 3

You can also do it like this by using a formula!!

N=int(input())
print(int(N*(N+1)/2))

Answer 4

The input is358
And the expected output must be 64261