programming-examples/c/Functions/C Program to Find the Nth Fibonacci Number using Recursion.c

/*
 * C Program to find the nth number in Fibonacci series using recursion
 */
#include <stdio.h>
int fibo(int);

int main()
{
    int num;
    int result;
    printf("Enter the nth number in fibonacci series: ");
    scanf("%d", &num);
    if (num < 0)
        {
            printf("Fibonacci of negative number is not possible.\n");
        }
    else
        {
            result = fibo(num);
            printf("The %d number in fibonacci series is %d\n", num, result);
        }
    return 0;
}
int fibo(int num)
{
    if (num == 0)
        {
            return 0;
        }
    else if (num == 1)
        {
            return 1;
        }
    else
        {
            return(fibo(num - 1) + fibo(num - 2));
        }
}