Find Fibonacci series in C language

 C program to find Fibonacci series

Code:

#include <stdio.h>

int fibo(int num);

int main()

{

    int num;

    int fibonacci;

    printf("Enter any number to find nth fibonacci term: ");

    scanf("%d", &num);

    fibonacci = fibo(num); 

    printf("%d fibonacci term is %d", num, fibonacci);

    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); 

}

Explanation:

What is Fibonacci series?

• A series of numbers in which each number (Fibonacci number) is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc.

• We are declaring the variables in integer data type

• We are asking the user to enter a series of number to check whether the number is Fibonacci series are not.

• Storing the series of number in "num" variable.

• Using if and else statements to check to check whether the entered number is Fibonacci or not.

Output: