C# Language Tutorial => Fibonacci Sequence

Example

You can calculate a number in the Fibonacci sequence using recursion.

Following the math theory of F(n) = F(n-2) + F(n-1), for any i > 0,

// Returns the i'th Fibonacci number
public int fib(int i) {
    if(i <= 2) {
        // Base case of the recursive function.
        // i is either 1 or 2, whose associated Fibonacci sequence numbers are 1 and 1.
        return 1;
    }
    // Recursive case. Return the sum of the two previous Fibonacci numbers.
    // This works because the definition of the Fibonacci sequence specifies
    // that the sum of two adjacent elements equals the next element.
    return  fib(i - 2) + fib(i - 1);
    
}

fib(10); // Returns 55

PDF - Download C# Language for free

Previous Next

C# Language

Fastest Entity Framework Extensions

Example

Got any C# Language Question?

C# Language

C# Language Recursion Fibonacci Sequence

Fastest Entity Framework Extensions

Example

Got any C# Language Question?