To find the Fibonacci series using recursion in C, we break the series into individual elements and recursively calculate them. The Fibonacci series is a numerical sequence of integers where each number is the sum of the two preceding ones, usually starting with 0 and 1.

Understand the problem – produce the first N numbers in the Fibonacci sequence. Design the function – with clear base and recursive cases. Read how many terms (N) the user wants. Loop from 0 to N–1, calling the recursive function each time. Print each Fibonacci number. Compile and test with small values (e.g., 5 or 6) to verify correctness.

The first two terms are printed directly in the printFibonacci function, and the remaining terms are printed recursively through calculateFibonacci. The base case ensures that the recursion stops when the desired number of terms is printed. Here’s a visual representation of recursive Fibonacci in C for first nine terms:

This method is often more efficient than recursion, especially for large values of n, as it avoids the overhead of function calls. We’ve already discussed how to write C program to generate Fibonacci series using recursion in C. In the following section we will discuss the alternate approaches for the same.