2021-05-06 10:46:27 +05:30
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/*
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* Author: Rak Laptudirm
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*
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* https://en.wikipedia.org/wiki/Newton%27s_method
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*
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* Finding the square root of a number using Newton's method.
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*/
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2021-05-30 17:04:24 +05:30
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function sqrt (num, precision = 4) {
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2021-05-13 13:18:51 +05:30
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if (!Number.isFinite(num)) { throw new TypeError(`Expected a number, received ${typeof num}`) }
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if (!Number.isFinite(precision)) { throw new TypeError(`Expected a number, received ${typeof precision}`) }
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2021-05-13 12:46:01 +05:30
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let sqrt = 1
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for (let i = 0; i < precision; i++) {
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sqrt -= (sqrt * sqrt - num) / (2 * sqrt)
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}
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return sqrt
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2021-05-06 10:46:27 +05:30
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}
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export { sqrt }
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