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factorial |
Also found in: Wikipedia, Hutchinson | 0.04 sec. |
factorialFor any whole number, the product of all the counting numbers up to and including itself. It is indicated with an exclamation point: 4! (read “four factorial”) is 1 × 2 × 3 × 4 = 24. In order for certain formulas involving permutations and combinations to work, 0! is defined to be 1. Factorials are particularly useful in calculating the number of ways an event can occur, for example, the number of possible orders of finish in a race. The number of sequences that can exist with a set of items, derived by multiplying the number of items by the next lowest number until 1 is reached. For example, three items have six sequences (3x2x1=6): 123, 132, 231, 213, 312 and 321. See factor and IFP.
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? Mentioned in | ? References in periodicals archive | ||
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| A factoral representation of gifted adolescent suicide. Reliability and factoral validity of computer attitude scale. The existence of this cognitive-behavioral strategy was demonstrated in several factoral analytic studies of people with cancer (e. |
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