Question

Write a program for finding sum of series 1+2+3+4+…….upto n terms.

Answer 1

Program :-
Source code :

//program to calculate sum of series up to n terms 1 + 2 + 3 +…+n.
#include <stdio.h>
#include <conio.h>
void main( )
{
         int n,i;
         int sum=0;
         printf("Enter the n i.e. max value of series: ");
         scanf("%d",&n);
         sum = (n * (n + 1)) / 2;
         printf("Sum of the series: ");
         for (i =1 ; i <= n ; i++)
         {
               if (i!=n)
                   printf("%d + ",i);
else
                   printf("%d = %d ",i,sum);
}
getch( );

Output :- 

Enter the n i.e. max value of series: 5 Sum of the series: 1 + 2 + 3 + 4 + 5 = 15