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Retos/Reto #21 - NÚMEROS PRIMOS GEMELOS [Media]/javascript/nlarrea.js
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/* | ||
* Crea un programa que encuentre y muestre todos los pares de números primos | ||
* gemelos en un rango concreto. | ||
* El programa recibirá el rango máximo como número entero positivo. | ||
* | ||
* - Un par de números primos se considera gemelo si la diferencia entre | ||
* ellos es exactamente 2. Por ejemplo (3, 5), (11, 13) | ||
* | ||
* - Ejemplo: Rango 14 | ||
* (3, 5), (5, 7), (11, 13) | ||
*/ | ||
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function getPairsOfPrimes(range) { | ||
let pairsOfPrimes = []; | ||
let pair = []; | ||
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for (let i=2; i<=range; i++) { | ||
if (isPrime(i)) { | ||
pair.push(i); | ||
if (pair.length === 2) { | ||
if (pair[1] - pair[0] === 2) { | ||
pairsOfPrimes.push(pair.slice()); | ||
} | ||
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pair.shift(); | ||
} | ||
} | ||
} | ||
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return pairsOfPrimes; | ||
} | ||
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const isPrime = (number) => { | ||
if (number < 2) return false; | ||
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for (let i=2; i<number; i++) { | ||
if (number % i === 0) return false; | ||
} | ||
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return true; | ||
} | ||
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function printPairs(pairs) { | ||
console.log('\nPairs of prime numbers:'); | ||
for (let pair of pairs) { | ||
console.log(pair); | ||
} | ||
} | ||
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printPairs(getPairsOfPrimes(14)); |