In the last few days, the "factorial of 100" is one of the top subjects and a lot of maths geeks compute it using voice assistants such as Alexa, Shiri, etc. In this post on MathDart I'll demonstrate how to calculate 100 as the factororial for 100 by using a quick detailed step-by-step instructions on how the 100! is calculated. To begin with, what exactly do you mean by a "factorial? A factorial can be described as the consequence of boosting all numbers in a selected number (for this instance, 100) all the way to 1. It is common to see factorials that are accompanied by an exclamation mark (!) following the number, such as 100! Factorial of a negative integer n, as represented by n! one of the products of positive numbers greater in or greater than n. N is equal to (n) * (n-1) * (n-2) * ... * 2 * 1 What is the Factorial of 100? Let's say 100! and then calculate the factorial multiplying the whole numbers by: 100 x 99 x 98 x 97 x 96 x 95 x 94 ... = 9.332621...