Factorial of 1

Professor Greenline Explaining Math Concepts

Factorial is the process of taking a number and multiplying it by all the lesser, natural numbers. The factorial of a number n is denoted by n!. In this topic, we will learn about the factorial of 1.

Factorial of 1 for US Students

What is the Factorial of 1?

We write the factorial of a number using an exclamation mark (!) after it.

If n is a natural number greater than or equal to 1, then: n! = n × (n - 1) × (n - 2) × (n - 3) × … × 3 × 2 × 1

To find the factorial of 1, we write it as: 1! = 1

Therefore, the factorial of 1 is 1.

Important Glossaries of Factorial of 1

Factorial: The way of multiplying all the natural numbers smaller than the original number is known as factorial, and it is expressed with an exclamation mark (!).

Natural numbers: Counting numbers starting from 1, 2, 3, and so on.

Identity element: An element that, when used in an operation with another number, leaves the other number unchanged. For multiplication, the identity element is 1.

Multiplicative identity: Another term for the identity element in multiplication, which is 1.

Exclamation mark: A symbol used to denote factorial in mathematics.

Jaskaran Singh Saluja

About the Author

Jaskaran Singh Saluja is a math wizard with nearly three years of experience as a math teacher. His expertise is in algebra, so he can make algebra classes interesting by turning tricky equations into simple puzzles.