factorials

Descending multiplication sequences

Factorials are the products obtained by multiplying a positive integer by all the positive integers below it.

The factorial of 5 (written 5!) is 5 × 4 × 3 × 2 × 1 = 120.

Factorials grow rapidly and appear throughout mathematics, especially in probability and combinatorics—calculating how many ways things can be arranged or selected.

mathematical

permutations

Ordered arrangements of elements

recursive · combinatorics · integers · product · calculation · notation · exclamation mark · formula · ascending · descending

combinatorial

arrangements

Organized plans or configurations

probability · sampling · shuffling · deck · cards · anagrams · seating · lineups · lottery · outcomes

educational

notation

System of written symbols

textbook · exercises · word problems · students · curriculum · examples · introduction · basics · definition · teaching

computational

algorithm

Finite problem-solving procedure

loop · function · stack · complexity · programming · efficiency · base case · cache · implementation · optimization

Categories
Opposites
mathematical operation type

factorialslogarithms

Exponent-finding operations

constants · linear functions · exponents · powers · square roots

growth rate

factorialslogarithms

Exponent-finding operations

diminishing returns · linear growth · inverse functions · exponential decay

mathematical direction/inverse

factorialsfactorization

Decomposing into multiplicative parts

derangements · prime factorization

Family

factorial

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Abstract · Rated G