Factorial

The factorial of a positive integer n, denoted n!, is the product of the first n positive integers.

Factorial is a middle school-level concept.

Classroom Articles on Pre-Algebra (Up to Middle School Level)

	Absolute Value	Line
	Arithmetic	Origin
	Arithmetic Series	Polynomial
	Associative	Power
	Base	Prime Factor
	Cartesian Coordinates	Prime Factorization
	Commutative	Prime Number
	Decimal Expansion	Pythagorean Theorem
	Distributive	Quotient
	Divisor	Real Line
	Equal	Real Number
	Fraction	Relatively Prime
	Function Graph	Right Angle
	Geometric Series	Rounding
	Greatest Common Divisor	Sequence
	Integer	Series
	Intersection	Set
	Interval	Square Number
	Irrational Number	Square Root
	Least Common Multiple