77 lines
2.2 KiB
Markdown
77 lines
2.2 KiB
Markdown
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---
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id: 56533eb9ac21ba0edf2244b8
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title: Concatenating Strings with the Plus Equals Operator
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localeTitle: Concatenando cadenas con el operador Plus Equals
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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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También podemos usar el operador <code>+=</code> para <dfn>concatenar</dfn> una cadena al final de una variable de cadena existente. Esto puede ser muy útil para romper una cadena larga en varias líneas.
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<strong>Nota</strong> <br> Cuidado con los espacios. La concatenación no agrega espacios entre las cadenas concatenadas, por lo que deberá agregarlas usted mismo.
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</section>
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## Instructions
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<section id='instructions'>
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Construya <code>myStr</code> en varias líneas concatenando estas dos cadenas: <code>"This is the first sentence. "</code> y <code>"This is the second sentence."</code> utilizando el operador <code>+=</code> . Utilice el operador <code>+=</code> similar a como se muestra en el editor. Comience por asignar la primera cadena a <code>myStr</code> , luego agregue la segunda cadena.
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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>myStr</code> debe tener un valor de <code>This is the first sentence. This is the second sentence.</code>
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testString: 'assert(myStr === "This is the first sentence. This is the second sentence.", "<code>myStr</code> should have a value of <code>This is the first sentence. This is the second sentence.</code>");'
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- text: Usa el operador <code>+=</code> para construir <code>myStr</code>
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testString: 'assert(code.match(/\w\s*\+=\s*[""]/g).length > 1 && code.match(/\w\s*\=\s*[""]/g).length > 1, "Use the <code>+=</code> operator to build <code>myStr</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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// Example
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var ourStr = "I come first. ";
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ourStr += "I come second.";
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// Only change code below this line
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var myStr;
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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 ourStr = "I come first. ";
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ourStr += "I come second.";
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var myStr = "This is the first sentence. ";
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myStr += "This is the second sentence.";
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```
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</section>
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