2.0 KiB
2.0 KiB
id, title, challengeType, videoUrl, localeTitle
id | title | challengeType | videoUrl | localeTitle |
---|---|---|---|---|
56533eb9ac21ba0edf2244af | Compound Assignment With Augmented Addition | 1 | 具有增强加法的复合赋值 |
Description
myVar = myVar + 5;
添加5
到myVar
。由于这是一种常见的模式,因此存在一步完成数学运算和赋值的运算符。一个这样的运算符是+=
运算符。 var myVar = 1;
myVar + = 5;
的console.log(myVar的); //返回6
Instructions
a
, b
和c
的赋值以使用+=
运算符。 Tests
tests:
- text: <code>a</code>应该等于<code>15</code>
testString: 'assert(a === 15, "<code>a</code> should equal <code>15</code>");'
- text: <code>b</code>应该等于<code>26</code>
testString: 'assert(b === 26, "<code>b</code> should equal <code>26</code>");'
- text: <code>c</code>应该等于<code>19</code>
testString: 'assert(c === 19, "<code>c</code> should equal <code>19</code>");'
- text: 您应该为每个变量使用<code>+=</code>运算符
testString: 'assert(code.match(/\+=/g).length === 3, "You should use the <code>+=</code> operator for each variable");'
- text: 不要修改行上方的代码
testString: 'assert(/var a = 3;/.test(code) && /var b = 17;/.test(code) && /var c = 12;/.test(code), "Do not modify the code above the line");'
Challenge Seed
var a = 3;
var b = 17;
var c = 12;
// Only modify code below this line
a = a + 12;
b = 9 + b;
c = c + 7;
After Test
console.info('after the test');
Solution
// solution required