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41 lines
778 B
JavaScript
41 lines
778 B
JavaScript
/**
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* Nth number of fibonacci's sequence
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*
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* Returns the nth number of fibonacci's sequence.
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*
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* @public
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*
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* @example
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* var fibonacci = require('path-to-algorithms/src/others/fibonacci').fibonacci;
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* var nth = fibonacci(20);
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*
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* console.log(nth); // 6765
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*
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* @param {Number} n The nth position in fibonacci's sequence
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*
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* @module others/fibonacci
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*/
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(function (exports) {
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'use strict';
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function fibonacci (n) {
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if (n > 97) {
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throw 'Input too large, results in inaccurate fibonacci value.';
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}
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var n1 = 0;
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var n2 = 1;
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var aux;
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while (n > 0) {
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aux = n1;
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n1 = n2;
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n2 += aux;
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n = n - 1;
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}
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return n1;
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}
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exports.fibonacci = fibonacci;
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})(typeof window === 'undefined' ? module.exports : window);
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