Write a program to find the sum of natural numbers upto a given limit

Source Code

#include<stdio.h>
#include<conio.h>
int main (int argc, char *argv[])
{
  clrscr();
  int i=0,r=0,s=0;
  printf("\n Enter the range:");
  scanf("%d",&r);
  for(i=1;i<=r;i++)
  {
        s+=i;
  }
  printf("\n The sum of %d numbers of the series is %d",r,s);
  getch();
}

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