Write a Program for calculating Sum of n numbers using recursion

#include<stdio.h>

#include<conio.h>

int sum ( int n);

void main ( )

{

int n , s;

printf (“enter a number”);

scanf ("%d", & n);

s = sum ( n);

printf (“\n sum of numbers is %d", s);

getch();

}

int sum ( int n)

{

if ( n = =0)

return ( 0);

else

return ( n + sum ( n -1));

}

Out Put:

enter a number 10
sum of numbers is 55