You need to implement a C# program that finds the nth Fibonacci number using recursion, where n is an input value. The Fibonacci sequence is a series of numbers in which each number is the sum of the two preceding ones, usually starting with 0 and 1.

C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter15: Recursion
Section: Chapter Questions
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You need to implement a C# program that finds the nth Fibonacci number using recursion, where n is an input value. The Fibonacci sequence is a series of numbers in which each number is the sum of the two preceding ones, usually starting with 0 and 1.

 

The program should have a function named Fibonacci(int n) that takes an integer as an argument and returns an integer representing the nth Fibonacci number.

 

Constraints:

The input integer will be within the range of 0 <= n <= 45

The function should have a time complexity of O(2^n)

You can test the program using the following test cases:

 

Console.WriteLine(Fibonacci(0)); // 0

Console.WriteLine(Fibonacci(1)); // 1

Console.WriteLine(Fibonacci(2)); // 1

Console.WriteLine(Fibonacci(3)); // 2

Console.WriteLine(Fibonacci(4)); // 3

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