304262a90f
* Improve Chinese translation in euler-problem-2 * Minor translation fix * Minor translation fix 2
68 lines
1.8 KiB
Markdown
68 lines
1.8 KiB
Markdown
---
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id: 5900f36e1000cf542c50fe81
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challengeType: 5
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title: 'Problem 2: Even Fibonacci Numbers'
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videoUrl: ''
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localeTitle: 问题2：斐波那契数列中的偶数
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---
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## Description
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<section id='description'>
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在斐波那契数列中，每一项都是前两项的和（第一项和第二项除外）。如果从1和2开始，前十项是：
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<div style='text-align: center;'>1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...</div>
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求出斐波那契数列中值是偶数的项的和，至第<code>n</code>项（包括第<code>n</code>项）为止。
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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>fiboEvenSum(10)</code>应该返回188。
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testString: 'assert.strictEqual(fiboEvenSum(10), 188, "<code>fiboEvenSum(10)</code> should return 188.");'
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- text: <code>fiboEvenSum(23)</code>应该返回60696。
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testString: 'assert.strictEqual(fiboEvenSum(23), 60696, "<code>fiboEvenSum(23)</code> should return 60696.");'
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- text: <code>fiboEvenSum(43)</code>应该返回1485607536。
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testString: 'assert.strictEqual(fiboEvenSum(43), 1485607536, "<code>fiboEvenSum(43)</code> should return 1485607536.");'
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- text: 您的函数未使用我们的测试值返回正确的结果。
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testString: 'assert.strictEqual(fiboEvenSum(18), 3382, "Your function is not returning the correct result using our tests values.");'
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- text: 您的函数应返回<code>even</code>数值。
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testString: 'assert.equal(fiboEvenSum(31) % 2 === 0, true, "Your function should return an <code>even</code> value.");'
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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 fiboEvenSum(n) {
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// You can do it!
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return true;
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}
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fiboEvenSum(10);
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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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