62 lines
		
	
	
		
			2.0 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			62 lines
		
	
	
		
			2.0 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| ---
 | |
| id: 587d7b7e367417b2b2512b23
 | |
| title: Use the parseInt Function
 | |
| challengeType: 1
 | |
| videoUrl: ''
 | |
| localeTitle: Usa la función de parseInt
 | |
| ---
 | |
| 
 | |
| ## Description
 | |
| <section id="description"> La <code>parseInt()</code> analiza una cadena y devuelve un entero. Aquí hay un ejemplo: <code>var a = parseInt("007");</code> La función anterior convierte la cadena "007" en un número entero 7. Si el primer carácter de la cadena no se puede convertir en un número, devuelve <code>NaN</code> . </section>
 | |
| 
 | |
| ## Instructions
 | |
| <section id="instructions"> Use <code>parseInt()</code> en la función <code>convertToInteger</code> para que convierta la cadena de entrada <code>str</code> en un entero, y la devuelva. </section>
 | |
| 
 | |
| ## Tests
 | |
| <section id='tests'>
 | |
| 
 | |
| ```yml
 | |
| tests:
 | |
|   - text: <code>convertToInteger</code> debe usar la <code>parseInt()</code>
 | |
|     testString: 'assert(/parseInt/g.test(code), "<code>convertToInteger</code> should use the <code>parseInt()</code> function");'
 | |
|   - text: <code>convertToInteger("56")</code> debe devolver un número
 | |
|     testString: 'assert(typeof(convertToInteger("56")) === "number", "<code>convertToInteger("56")</code> should return a number");'
 | |
|   - text: <code>convertToInteger("56")</code> debe devolver 56
 | |
|     testString: 'assert(convertToInteger("56") === 56, "<code>convertToInteger("56")</code> should return 56");'
 | |
|   - text: <code>convertToInteger("77")</code> debe devolver 77
 | |
|     testString: 'assert(convertToInteger("77") === 77, "<code>convertToInteger("77")</code> should return 77");'
 | |
|   - text: <code>convertToInteger("JamesBond")</code> debe devolver NaN
 | |
|     testString: 'assert.isNaN(convertToInteger("JamesBond"), "<code>convertToInteger("JamesBond")</code> should return NaN");'
 | |
| 
 | |
| ```
 | |
| 
 | |
| </section>
 | |
| 
 | |
| ## Challenge Seed
 | |
| <section id='challengeSeed'>
 | |
| 
 | |
| <div id='js-seed'>
 | |
| 
 | |
| ```js
 | |
| function convertToInteger(str) {
 | |
| 
 | |
| }
 | |
| 
 | |
| convertToInteger("56");
 | |
| 
 | |
| ```
 | |
| 
 | |
| </div>
 | |
| 
 | |
| 
 | |
| 
 | |
| </section>
 | |
| 
 | |
| ## Solution
 | |
| <section id='solution'>
 | |
| 
 | |
| ```js
 | |
| // solution required
 | |
| ```
 | |
| </section>
 |