83 lines
2.4 KiB
Markdown
83 lines
2.4 KiB
Markdown
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---
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id: a5229172f011153519423690
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title: Sum All Odd Fibonacci Numbers
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localeTitle: Suma todos los números impares de Fibonacci
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isRequired: true
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challengeType: 5
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---
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## Description
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<section id='description'>
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Dado un número entero positivo <code>num</code> , devolver la suma de todos los números impares de Fibonacci que son menos que o igual a <code>num</code> .
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Los dos primeros números en la secuencia de Fibonacci son 1 y 1. Cada número adicional en la secuencia es la suma de los dos números anteriores. Los primeros seis números de la secuencia de Fibonacci son 1, 1, 2, 3, 5 y 8.
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Por ejemplo, <code>sumFibs(10)</code> debe devolver <code>10</code> porque todos los números impares de Fibonacci menores o iguales a <code>10</code> son 1, 1, 3, y 5.
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Recuerda usar <a href='http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514' target='_blank'>Read-Search-Ask</a> si te atascas. Trate de emparejar el programa. Escribe tu propio código.
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>sumFibs(1)</code> debe devolver un número.
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testString: 'assert(typeof sumFibs(1) === "number", "<code>sumFibs(1)</code> should return a number.");'
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- text: <code>sumFibs(1000)</code> debe devolver 1785.
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testString: 'assert(sumFibs(1000) === 1785, "<code>sumFibs(1000)</code> should return 1785.");'
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- text: <code>sumFibs(4000000)</code> debe devolver 4613732.
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testString: 'assert(sumFibs(4000000) === 4613732, "<code>sumFibs(4000000)</code> should return 4613732.");'
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- text: <code>sumFibs(4)</code> debe devolver 5.
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testString: 'assert(sumFibs(4) === 5, "<code>sumFibs(4)</code> should return 5.");'
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- text: <code>sumFibs(75024)</code> debe devolver 60696.
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testString: 'assert(sumFibs(75024) === 60696, "<code>sumFibs(75024)</code> should return 60696.");'
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- text: <code>sumFibs(75025)</code> debe devolver 135721.
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testString: 'assert(sumFibs(75025) === 135721, "<code>sumFibs(75025)</code> should return 135721.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function sumFibs(num) {
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return num;
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}
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sumFibs(4);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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function sumFibs(num) {
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var a = 1;
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var b = 1;
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var s = 0;
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while (a <= num) {
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if (a % 2 !== 0) {
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s += a;
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}
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a = [b, b=b+a][0];
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}
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return s;
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}
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```
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</section>
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