freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/compound-assignment-with-augmented-multiplication.md

id, challengeType, videoUrl, forumTopicId, localeTitle

id	challengeType	videoUrl	forumTopicId	localeTitle
56533eb9ac21ba0edf2244b1	1	https://scrimba.com/c/c83vrfa	16662	复合赋值之 *=

Description

*=操作符是让变量与一个数相乘并赋值。 myVar = myVar * 5; 变量myVar等于自身与数值5相乘的值。也可以写作这样的形式: myVar *= 5;

Instructions

使用*=操作符实现同样的效果。

Tests

tests:
  - text: <code>a</code>应该等于<code>25</code>。
    testString: assert(a === 25);
  - text: <code>b</code>应该等于<code>36</code>。
    testString: assert(b === 36);
  - text: <code>c</code>应该等于<code>46</code>。
    testString: assert(c === 46);
  - text: 应该对每个变量使用<code>*=</code>操作符。
    testString: assert(code.match(/\*=/g).length === 3);
  - text: 不要修改注释上面的代码。
    testString: assert(/var a = 5;/.test(code) && /var b = 12;/.test(code) && /var c = 4\.6;/.test(code));

Challenge Seed

var a = 5;
var b = 12;
var c = 4.6;

// Only modify code below this line

a = a * 5;
b = 3 * b;
c = c * 10;

After Test

(function(a,b,c){ return "a = " + a + ", b = " + b + ", c = " + c; })(a,b,c);

Solution

var a = 5;
var b = 12;
var c = 4.6;

a *= 5;
b *= 3;
c *= 10;