73 lines
2.8 KiB
Markdown
73 lines
2.8 KiB
Markdown
---
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title: IBAN
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id: 5a23c84252665b21eecc7eaf
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challengeType: 5
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videoUrl: ''
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localeTitle: 他们
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---
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## Description
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<section id="description"> <a href="https://en.wikipedia.org/wiki/International_Bank_Account_Number">国际银行账号（IBAN）</a>是一种国际商定的识别跨国界银行账户的方法，降低了传播<a href="https://en.wikipedia.org/wiki/Transcription_error">抄写错误的</a>风险。 IBAN最多包含34个字母数字字符： <ul><li>首先是两个字母的ISO 3166-1 alpha-2国家代码</li><li>然后是两个校验位，和</li><li>最后是国家特定的基本银行帐号（BBAN）。 </li></ul>通过检查数字，即使在提交交易之前，也可以对银行帐号进行健全性检查以确认其完整性。编写一个以IBAN字符串作为参数的函数。如果有效则返回true。否则，返回false。 </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>isValid</code>应该是一个函数。
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testString: 'assert(typeof isValid=="function","<code>isValid</code> should be a function.");'
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- text: '<code>isValid(""+tests[0]+"")</code>应该返回一个布尔值。'
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testString: 'assert(typeof isValid(tests[0])=="boolean","<code>isValid(""+tests[0]+"")</code> should return a boolean.");'
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- text: '<code>isValid(""+tests[0]+"")</code>应该返回<code>true</code> 。'
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testString: 'assert.equal(isValid(tests[0]),true,"<code>isValid(""+tests[0]+"")</code> should return <code>true</code>.");'
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- text: '<code>isValid(""+tests[1]+"")</code>应返回<code>false</code> 。'
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testString: 'assert.equal(isValid(tests[1]),false,"<code>isValid(""+tests[1]+"")</code> should return <code>false</code>.");'
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- text: '<code>isValid(""+tests[2]+"")</code>应返回<code>false</code> 。'
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testString: 'assert.equal(isValid(tests[2]),false,"<code>isValid(""+tests[2]+"")</code> should return <code>false</code>.");'
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- text: '<code>isValid(""+tests[3]+"")</code>应该返回<code>false</code> 。'
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testString: 'assert.equal(isValid(tests[3]),false,"<code>isValid(""+tests[3]+"")</code> should return <code>false</code>.");'
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- text: '<code>isValid(""+tests[4]+"")</code>应该返回<code>true</code> 。'
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testString: 'assert.equal(isValid(tests[4]),true,"<code>isValid(""+tests[4]+"")</code> should return <code>true</code>.");'
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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 isValid (iban) {
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// Good luck!
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}
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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console.info('after the test');
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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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