Write a program to print the sum of all numbers up to the given number.

Dr. A.P.J. Abdul Kalam Technical University, Lucknow

KCS101 / KCS201 Programming for Problem Solving - Using C Language

Lab Exercises

12. Write a program to print the sum of all numbers up to the given number.

/*

 File: Prgrm12.c

 Author: Aditya Saini

 Date: Sept 30, 2019

 Description: Program to print the sum of all numbers up to given number.

*/

#include <stdio.h>

int main (void)

{

               int number;
               int sum;
               int i;

               //Input number.
               printf ("Input number: ");
               scanf ("%d", &number);

               //Finding the sum.

               for (sum = 0, i = 1; i <= number; i++)
               {
                              sum = sum + i; 
               }

               //Output the result
               printf ("Sum of all numbers up to %d is %d.", number, sum);
               

               return 0;

};

Output

Input number: 9

Sum of all numbers up to 9 is 45.