C Program to Check if Nth Fibonacci Number is Prime

This C program calculates the Nth Fibonacci number and checks whether it is a prime number using separate functions for Fibonacci generation and prime checking.

Concept Overview

The Fibonacci series is a sequence where each number is the sum of the previous two. Prime numbers are numbers greater than 1 that have no divisors other than 1 and themselves. This program combines both concepts to check if a particular Fibonacci term is prime.

Program

// Code file not found: c-program-fibonacci-prime.c

Output

Enter the element of fibonacci to be checked: 7
Fibonacci number 13
7 element of fibonacci series is a prime number

Explanation

• `is_fib_prime(int n)` – Finds the nth Fibonacci number and checks if it is prime.
• `fibonacciNumber(int n)` – Generates the Fibonacci number using iteration.
• `isPrime(int num)` – Checks if the given number is prime by counting its divisors.
• If the count of divisors equals 2, the number is prime; otherwise, it’s not.