C PROGRAM: TO CALCULATE SUM OF SERIES 1+2+3+--------UPTO N TERMS

CODING:
#include<stdio.h>
#include<conio.h>
void main()
{
 int i,n,sum=0;
 clrscr();
 printf("sum of series upto: ");
 scanf("%d",&n);
 for(i=1;i<=n;i++)
 {
  sum=sum+i;
 }
 printf("Sum of series= %d",sum);
 getch();
}

CODING

OUTPUT

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