C program

The sum of first N natural numbers Write a program to calculate the sum of a sequence of N natural numbers, i.e. i, i+1,i+2, ... i+N-1 Positive integers 1,2,3...n are known as natural numbers. Input Specification: Enter the first number i and the length of the sequence N to be calculated. Output Specification: Ouput the sum of the sequence. Sample Input: 35 Sample Output: 25