PROGRAM-17

// Program of summation of natural number

#include

#include

void main()

{

 clrscr();

 int num,n,sum=0;

 printf("Enter the number of natural number:  ");

 scanf("%d", &n);

 for(num=1;num<=n;num++)

 sum+=num;

 printf("sum of %d natural number  is=%5d\n",n,sum);

 getch();

}

Algorithm

·                     Start

·                     Declare num, n, sum=0 as integer

·                      Write(“the number of natural number”)

·                      Read(“the number of natural number”)

·                      for(num=1;num<=n;num++)

·                      sum+=num

·                      Read("sum of natural number”)

·                     Stop