Series : 1 + 2 + 3 + 4 + 5 +.......

/*P5.3 Program to display and find out the sum of series*/
/* Series : 1 + 2 + 3 + 4 + 5 +....... */

#include<stdio.h>
int series(int n);
int rseries(int n);

main( )
{
    int n;
    printf("Enter number of terms : ");
    scanf("%d", &n);
   
    printf("\b\b = %d\n", series(n));    /*  \b to erase last +sign */
    printf("\b\b = %d\n\n\n", rseries(n));
}/*End of main()*/

/*Iterative function*/
int series(int n)
{
    int i, sum=0;
    for(i=1; i<=n; i++)
    {
        printf("%d + ", i);
        sum+=i;   
    }
    return sum;
}/*End of series()*/

/*Recursive function*/
int rseries(int n)
{
    int sum;
    if(n == 0)
        return 0;
    sum = (n + rseries(n-1));
    printf("%d + ",n);
    return sum;
}/*End of rseries()*/