### Explanation

The program generates the Fibonacci series up to the number of terms entered by the user using a recursive function.

#### Header

The code begins with including the standard input-output header file using `#include <stdio.h>`

.

#### Function Declaration

The program declares a recursive function `fibonacci`

to generate the nth element in the Fibonacci series:

`int fibonacci(int n)`

: Declares the function with an integer parameter`n`

.

#### Function Definition

The program defines the `fibonacci`

function:

`if (n == 0)`

: Defines the base case where the first element in the series is 0.`return 0;`

: Returns 0 if the base case is met.`if (n == 1)`

: Defines the base case where the second element in the series is 1.`return 1;`

: Returns 1 if the base case is met.`return fibonacci(n - 1) + fibonacci(n - 2);`

: Defines the recursive case where the nth element is equal to the sum of the previous two elements.

#### Variable Declaration

The `main()`

function is defined, and a variable is declared:

`int n`

: Variable to hold the number of elements in the series.

#### Program Description

The program prints a description message for the user to understand its functionality.

#### User Input

The user is prompted to enter the number of elements in the series:

`printf("Enter the number of elements in the series: ");`

: Prompts the user to enter the number of elements.`scanf("%d", &n);`

: Reads the number of elements and stores it in`n`

.

#### Fibonacci Series Generation

The program generates the Fibonacci series up to the nth element using the `fibonacci`

function:

`printf("Fibonacci series: ");`

: Prints a label for the series.`for (int i = 0; i < n; i++)`

: Loops through each element up to the nth element.`printf("%d ", fibonacci(i));`

: Calls the`fibonacci`

function to generate the ith element and prints it.

#### Output Result

The program prints the Fibonacci series up to the nth element.

#### Program End

The program ends with `printf("\n");`

to print a new line and `return 0;`

to indicate successful execution.

### Code

` ````
/*
* -----------------------------------------------------------
* Logic Building with Computer Programming (CSU1128)
* Instructor: Dr. Pankaj Vaidya | Author: Divya Mohan
*
* This code is a part of the educational initiative by dmj.one
* with aim of empowering and inspiring learners in the field of
* Computer Science and Engineering through the respective courses.
*
* (c) 2022, Divya Mohan for dmj.one. All rights reserved.
* -----------------------------------------------------------
*/
#include <stdio.h>
// Declare a recursive function to generate the nth element in the Fibonacci series
int fibonacci(int n)
{
// Define the base case where the first two elements in the series are 0 and 1
if (n == 0)
{
return 0;
}
if (n == 1)
{
return 1;
}
// Define the recursive case where the nth element is equal to the sum of the previous two elements
return fibonacci(n - 1) + fibonacci(n - 2);
}
int main()
{
printf("\n\n Program to generate fibonacci series till the number of terms entered by the user through function recursion. \n\n");
// Declare a variable to hold the number of elements in the series
int n;
// Read the number of elements from the user
printf("Enter the number of elements in the series: ");
scanf("%d", &n);
// Generate the Fibonacci series using the fibonacci function
printf("Fibonacci series: ");
for (int i = 0; i < n; i++)
{
printf("%d ", fibonacci(i));
}
printf("\n");
return 0;
}
```

### Output

Program to generate fibonacci series till the number of terms entered by the user through function recursion.

Enter the number of elements in the series: 10

Fibonacci series: 0 1 1 2 3 5 8 13 21 34