You are given a number N. Find the sum of all numbers from 1 to N. code example
Example: formula for sum of n numbers
Sum of the First n Natural Numbers. We prove the formula 1+ 2+ ... + n = n(n+1) / 2, for n a natural numberSum of the First n Natural Numbers. We prove the formula 1+ 2+ ... + n = n(n+1) / 2, for n a natural number