20 lines
367 B
JavaScript
20 lines
367 B
JavaScript
/**
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* Calculates the binomial coefficient n choose k
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*
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* @param {number} n
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* @param {number} k
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*/
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function nCk(n, k) {
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if (k < 0 || k > n) return 0;
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let result = 1;
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for (let i = 0; i < k; i++) {
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// `result *= (n - i) / (i + 1)` can cause floating point errors
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result = result * (n - i) / (i + 1);
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}
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return result;
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}
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console.log(nCk(5, 3));
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