mirror of
https://github.com/photonstorm/phaser
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34 lines
674 B
JavaScript
34 lines
674 B
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2013-2023 Photon Storm Ltd.
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* @license {@link https://opensource.org/licenses/MIT|MIT License}
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*/
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/**
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* Calculates the factorial of a given number for integer values greater than 0.
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*
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* @function Phaser.Math.Factorial
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* @since 3.0.0
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*
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* @param {number} value - A positive integer to calculate the factorial of.
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*
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* @return {number} The factorial of the given number.
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*/
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var Factorial = function (value)
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{
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if (value === 0)
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{
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return 1;
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}
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var res = value;
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while (--value)
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{
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res *= value;
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}
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return res;
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};
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module.exports = Factorial;
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