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ELEMENTARY

ALGEBRA

BASIC

CALCULUS

CAS

DATA

GRAPHING

MANUAL

MATRIX

NUMBER

PLOT

SCRIPTING

SPECIAL

SPECIAL POLYNOMIALS

STATISTICAL

TRIGONOMETRIC

VECTOR CALCULUS
  Factorial(n)
Returns the number of ways n elements can be ordered.

n! = 1 * 2 * 3 * ..... (n-1) * n


Examples  



References
http://mathworld.wolfram.com/Factorial.html
http://en.wikipedia.org/wiki/Factorial

Related Functions
nPr, nCr, Binomial, Multinomial





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