// Fibonacci function to find the Nth term in the sequence using a for loop. private ulong Fibonacci(int nthTerm) { if (nthTerm > 1) { ulong number1 = 0L; ulong number2 = 1L; ulong sum = 0L; // Starting at the second term calculate the nthTerm by adding the last term to the one // preceeding it. for (int count = 1; count < nthTerm; count++) { sum = number1 + number2; number1 = number2; number2 = sum; } return sum; } return 1; } // Fibonacci function to find the Nth term in the sequence using recursion (inefficient). private ulong Fibonacci2(int nthTerm) { if (nthTerm > 2) { return fibonacci2(nthTerm - 1) + fibonacci2(nthTerm - 2); } return 1; }

**Posted:** March 19, 2023

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