How to resolve the algorithm Factorial step by step in the Red programming language
Published on 12 May 2024 09:40 PM
How to resolve the algorithm Factorial step by step in the Red programming language
Table of Contents
Problem Statement
Write a function to return the factorial of a number. Solutions can be iterative or recursive. Support for trapping negative n errors is optional.
Let's start with the solution:
Step by Step solution about How to resolve the algorithm Factorial step by step in the Red programming language
Source code in the red programming language
fac: function [n][r: 1 repeat i n [r: r * i] r]
fac: function [n][repeat i also n n: 1 [n: n * i] n]
fac: func [n][either n > 1 [n * fac n - 1][1]]
fac: func [n][any [if n = 0 [1] n * fac n - 1]]
fac: func [n][do pick [[n * fac n - 1] 1] n > 1]
fac: function [n][m: #(0 1) any [m/:n m/:n: n * fac n - 1]]
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