Question

In general, which of the following methods isn’t used to find the factorial of a number?

(a) Recursion

(b) Iteration

(c) Dynamic programming

(d) Non iterative / recursive

This question was addressed to me in an interview.

I want to ask this question from Factorial using Recursion in section Recursion of Data Structures & Algorithms II

Answer 1

Correct answer is (d) Non iterative / recursive

Easy explanation - In general we use recursion, iteration and dynamic programming to find the factorial of a number. We can also implement without using iterative / recursive method by using tgammal() method. Most of us never use it generally.