In mathematics, the factorial of a non-negative integer , denoted by , is the product of all positive integers less than or equal to . The factorial of also equals the product of with the next smaller …

Aug 1, 2025 · Factorial Problem 1 How many different ways can the letters in the word “document” be arranged? For this problem we simply take the number of letters in the word …

The factorial function (symbol: !) says to multiply all whole numbers from our chosen number down to 1. Examples:

Mar 7, 2025 · The factorial of a non-negative integer n, denoted by the symbol n! (read as ‘n factorial’), represents the product of all positive integers from 1 to n. n! = n × (n – 1) × (n – 2) × …

Oct 16, 2025 · The factorial of a number is the product of all positive integers from that number down to 1. It plays a key role in many mathematical concepts, such as permutations, …

Find the factorial of -1 as well how many trailing zeros and number of digits in -1 factorial by using our Factorial Calculator

How to calculate the factorial of a number. Learn how to use this function: the factorial of n is the result of all the integer numbers up from 1 to n.

What is a factorial? A factorial of N is the product of all positive integers between 1 and N inclusive. For example, the factorial of 5 is 5×4×3×2×1=120. The one exception is 0!, which is …

The factorial of n is denoted by n! and calculated by the product of integer numbers from 1 to n.

written after the integer. For example, "five factorial" would be written as "5!" and evaluated as follows: 5! = 5 × 4 × 3 × 2 × 1 = 120 The factorial of 0 is 1: 0! = 1 The factorial of 1 is also 1, as …