64 lines
1.8 KiB
Markdown
64 lines
1.8 KiB
Markdown
---
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id: 5900f3801000cf542c50fe93
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challengeType: 5
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title: 'Problem 20: Factorial digit sum'
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videoUrl: ''
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localeTitle: 'Problema 20: suma de dígitos factoriales'
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---
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## Description
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<section id="description"> <var>n</var> ! significa <var>n</var> × ( <var>n</var> - 1) × ... × 3 × 2 × 1 Por ejemplo, 10! = 10 × 9 × ... × 3 × 2 × 1 = 3628800, <br> y la suma de los dígitos en el número 10! es 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27. ¡Encuentra la suma de los dígitos <var>n</var> ! </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>sumFactorialDigits(10)</code> debe devolver 27.
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testString: 'assert.strictEqual(sumFactorialDigits(10), 27, "<code>sumFactorialDigits(10)</code> should return 27.");'
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- text: <code>sumFactorialDigits(25)</code> debe devolver 72.
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testString: 'assert.strictEqual(sumFactorialDigits(25), 72, "<code>sumFactorialDigits(25)</code> should return 72.");'
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- text: <code>sumFactorialDigits(50)</code> debe devolver 216.
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testString: 'assert.strictEqual(sumFactorialDigits(50), 216, "<code>sumFactorialDigits(50)</code> should return 216.");'
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- text: <code>sumFactorialDigits(75)</code> debe devolver 432.
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testString: 'assert.strictEqual(sumFactorialDigits(75), 432, "<code>sumFactorialDigits(75)</code> should return 432.");'
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- text: <code>sumFactorialDigits(100)</code> debe devolver 648.
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testString: 'assert.strictEqual(sumFactorialDigits(100), 648, "<code>sumFactorialDigits(100)</code> should return 648.");'
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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 sumFactorialDigits(n) {
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// Good luck!
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return n;
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}
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sumFactorialDigits(100);
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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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// solution required
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```
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</section>
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