I have to do this exercise in Python but I don't know how to do it:

Question

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

Answer 1

I know it's hard for beginner but try to start understand the Python concept , you can certainly solve it easily 😁

n = int(input("Input a number: "))
sum_all = (n * (n + 1)) / 2
print(sum_all)

Answer 2

You can find all kinds of solutions here:

https://stackoverflow.com/questions/43901484/sum-of-the-integers-from-1-to-n

However, the easiest way is to just use the formula:

sum[1, n] = n * ( n + 1 ) / 2

Answer 3

Thanks. I know it's a beginner exercise, but as my solution was very ambiguous, I wanted a cleaner one ;)