freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript.chinese.md

id, title, challengeType, videoUrl, localeTitle

id	title	challengeType	videoUrl	localeTitle
56533eb9ac21ba0edf2244ad	Decrement a Number with JavaScript	1		使用JavaScript减少数字

Description

您可以使用--运算符轻松地将变量减1或减1。 i--;相当于i = i - 1; 注意
整条线变成了i--; ，消除了对等号的需要。

Instructions

更改代码以在myVar上使用--运算符。

Tests

tests:
  - text: <code>myVar</code>应该等于<code>10</code>
    testString: 'assert(myVar === 10, "<code>myVar</code> should equal <code>10</code>");'
  - text: <code>myVar = myVar - 1;</code>应该改变
    testString: 'assert(/var\s*myVar\s*=\s*11;\s*\/*.*\s*([-]{2}\s*myVar|myVar\s*[-]{2});/.test(code), "<code>myVar = myVar - 1;</code> should be changed");'
  - text: 在<code>myVar</code>上使用<code>--</code>运算符
    testString: 'assert(/[-]{2}\s*myVar|myVar\s*[-]{2}/.test(code), "Use the <code>--</code> operator on <code>myVar</code>");'
  - text: 不要更改行上方的代码
    testString: 'assert(/var myVar = 11;/.test(code), "Do not change code above the line");'

Challenge Seed

var myVar = 11;

// Only change code below this line
myVar = myVar - 1;

After Test

console.info('after the test');

Solution

// solution required