The factorial of n is the product of all positive integers from 1 to n.
What Is Factorial?
The factorial of n is the product of all positive integers from 1 to n.
Examples of Factorial
1
5! = 120.Formula and Key Points
Formula / rule
n! = n(n−1)…1
- Know the definition and standard notation for Factorial.
- Be able to recognise or compute factorial in a small example.
- Connect the concept to nearby topics in the same subject before using it in larger CSE problems.
Why This Matters in Computer Science
Used in algorithm proofs, counting, recurrence analysis, data structures and theoretical computer science.
Related Math Terms
Factorial: Frequently Asked Questions
What is Factorial?
The factorial of n is the product of all positive integers from 1 to n.
Why is Factorial useful in computer science?
Used in algorithm proofs, counting, recurrence analysis, data structures and theoretical computer science.