2018-10-08 17:34:43 +00:00
---
id: 56533eb9ac21ba0edf2244b0
title: Compound Assignment With Augmented Subtraction
challengeType: 1
2018-10-10 20:20:40 +00:00
videoUrl: ''
localeTitle: Asignación compuesta con resta aumentada
2018-10-08 17:34:43 +00:00
---
## Description
2018-10-10 20:20:40 +00:00
< section id = "description" > Al igual que el operador < code > +=< / code > , < code > -=< / code > resta un número de una variable. < code > myVar = myVar - 5;< / code > restará < code > 5< / code > de < code > myVar< / code > . Esto se puede reescribir como: < code > myVar -= 5;< / code > < / section >
2018-10-08 17:34:43 +00:00
## Instructions
2018-10-10 20:20:40 +00:00
< section id = "instructions" > Convierta las asignaciones para < code > a< / code > , < code > b< / code > y < code > c< / code > para usar el operador < code > -=< / code > . < / section >
2018-10-08 17:34:43 +00:00
## Tests
< section id = 'tests' >
```yml
tests:
- text: < code > a</ code > debe ser igual a < code > 5</ code >
testString: 'assert(a === 5, "< code > a< / code > should equal < code > 5< / code > ");'
- text: < code > b</ code > debería ser igual a < code > -6</ code >
testString: 'assert(b === -6, "< code > b< / code > should equal < code > -6< / code > ");'
- text: < code > c</ code > debería ser igual a < code > 2</ code >
testString: 'assert(c === 2, "< code > c< / code > should equal < code > 2< / code > ");'
- text: Debe usar el operador < code > -=</ code > para cada variable
testString: 'assert(code.match(/-=/g).length === 3, "You should use the < code > -=< / code > operator for each variable");'
- text: No modifique el código sobre la línea.
testString: 'assert(/var a = 11;/.test(code) & & /var b = 9;/.test(code) & & /var c = 3;/.test(code), "Do not modify the code above the line");'
```
< / section >
## Challenge Seed
< section id = 'challengeSeed' >
< div id = 'js-seed' >
```js
var a = 11;
var b = 9;
var c = 3;
// Only modify code below this line
a = a - 6;
b = b - 15;
c = c - 1;
```
< / div >
### After Test
< div id = 'js-teardown' >
```js
console.info('after the test');
```
< / div >
< / section >
## Solution
< section id = 'solution' >
```js
2018-10-10 20:20:40 +00:00
// solution required
2018-10-08 17:34:43 +00:00
```
< / section >