C/C++ Program for Fibonacci Series Using Recursion

Series 0, 1, 1, 2, 3, 5, 8, 13, 21 . . . . . . . is a Fibonacci series. In Fibonacci series, each term is the sum of the two going before terms.

The C and C++ program for Fibonacci series utilizing recursion is given beneath.

C Program

#include<stdio.h>
 
int fibonacci(int n)
{
    if((n==1)||(n==0))
    {
        return(n);
    }
    else
    {
        return(fibonacci(n-1)+fibonacci(n-2));
    }
}
 
int main()
{
    int n,i=0;
    printf("Input the number of terms for Fibonacci Series:");
    scanf("%d",&n);
    printf("\nFibonnaci Series is as follows\n");
    while(i<n)
    {
        printf("%d ",fibonacci(i));
        i++;
    }
 
    return 0;
}

C++ Program

#include<iostream>
 
using namespace std;
 
int fibonacci(int n)
{
    if((n==1)||(n==0))
    {
        return(n);
    }
    else
    {
        return(fibonacci(n-1)+fibonacci(n-2));
    }
}
 
int main()
{
    int n,i=0;
    cout<<"Input the number of terms for Fibonacci Series:";
    cin>>n;
    cout<<"\nFibonacci Series is as follows\n";
 
    while(i<n)
    {
        cout<<" "<<fibonacci(i);
        i++;
    }
 
    return 0;
}

Output