77 lines
1.7 KiB
Markdown
77 lines
1.7 KiB
Markdown
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---
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id: 56533eb9ac21ba0edf2244ad
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title: Decrement a Number with JavaScript
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localeTitle: Disminuir un número con JavaScript
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challengeType: 1
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---
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## Description
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<section id='description'>
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Puede <dfn>disminuir</dfn> o disminuir fácilmente una variable por una con el operador <code>--</code> .
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<code>i--;</code>
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es el equivalente de
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<code>i = i - 1;</code>
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<strong>Nota</strong> <br> La línea entera se convierte en <code>i--;</code> , eliminando la necesidad del signo igual.
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</section>
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## Instructions
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<section id='instructions'>
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Cambie el código para usar el operador <code>--</code> en <code>myVar</code> .
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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>myVar</code> debe ser igual a <code>10</code>
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testString: 'assert(myVar === 10, "<code>myVar</code> should equal <code>10</code>");'
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- text: <code>myVar = myVar - 1;</code> debería ser cambiado
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testString: 'assert(/var\s*myVar\s*=\s*11;\s*\/*.*\s*([-]{2}\s*myVar|myVar\s*[-]{2});/.test(code), "<code>myVar = myVar - 1;</code> should be changed");'
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- text: Utilice el <code>--</code> operador en <code>myVar</code>
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testString: 'assert(/[-]{2}\s*myVar|myVar\s*[-]{2}/.test(code), "Use the <code>--</code> operator on <code>myVar</code>");'
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- text: No cambie el código por encima de la línea
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testString: 'assert(/var myVar = 11;/.test(code), "Do not change code above the line");'
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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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var myVar = 11;
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// Only change code below this line
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myVar = myVar - 1;
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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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var myVar = 11;
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myVar--;
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```
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</section>
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