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Commit 92a81a2

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merge: Add Twin Primes algorithm (#1024)
* Create TwinPrime.js * Update TwinPrime.js * Create TwinPrime.test.js * Update TwinPrime.js * Update TwinPrime.js * Add suggestions * Update TwinPrime.test.js * Update TwinPrime.js * Styling
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‎Maths/TwinPrime.js‎

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import { PrimeCheck } from './PrimeCheck'
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/**
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* @function twinPrime
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* Gets the 'twin prime' of a prime number.
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*
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* @param {Integer} n The number to find the twin prime of.
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* @returns {Integer} Either the twin, or -1 if n or n + 2 is not prime.
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*
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* @see https://en.wikipedia.org/wiki/Twin_prime
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*
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* @example twinPrime(5) = 7
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* @example twinPrime(4) = -1
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*/
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function twinPrime (n) {
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const prime = PrimeCheck(n)
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if (!prime) {
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return -1
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}
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if (!PrimeCheck(n + 2)) {
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return -1
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}
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return n + 2
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}
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export { twinPrime }

‎Maths/test/TwinPrime.test.js‎

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import { twinPrime } from '../TwinPrime.js'
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describe('Twin Primes', () => {
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it('Should be valid twin primes', () => {
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expect(twinPrime(3)).toBe(5)
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expect(twinPrime(5)).toBe(7)
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expect(twinPrime(4)).toBe(-1)
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expect(twinPrime(17)).toBe(19)
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})
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})

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AltStyle によって変換されたページ (->オリジナル) /