blocks|key|1322969|text|提示返回一个字符串，但您正在对一个数字执行严格相等的测试。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1322970|你可以...|1322971|使用|1322972|测试字符串，而不是使用number+===+"5"、|unordered-list-item|offset|length|style|CODE|1322973|或使用==代替===，这将为您执行转换，使用|1322974|或使用number+=+parseInt(number,+10)|1322975|or将提示转换为数字如果您可能要测试浮点数，请使用number+=+parseFloat(number)|1322976|1322977|entityMap^0|0|0|0|B|E|0|3|2|7|3|0|3|T|0|P|R|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|W|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|X|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|Y|8|@$I|Z|J|10|K|L]]|9|@]|A|$]]|$1|M|3|N|5|H|7|11|8|@$I|12|J|13|K|L]|$I|14|J|15|K|L]]|9|@]|A|$]]|$1|O|3|P|5|H|7|16|8|@$I|17|J|18|K|L]]|9|@]|A|$]]|$1|Q|3|R|5|H|7|19|8|@$I|1A|J|1B|K|L]]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|U|$]]

The prompt is returning a string, but you're doing a strict equal test for a number. 

You can...

<ul>
<li>Test for a string instead with <code>number === "5"</code>, </li>
<li>or use <code>==</code> instead of <code>===</code>, which will do a conversion for you,</li>
<li>or convert the prompt to a number with <code>number = parseInt(number, 10)</code></li>
<li>or if you'll potentially be testing for floats, use <code>number = parseFloat(number)</code></li>
</ul>

blocks|key|1441448|text|我建议：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1441449|var+number+=+parseInt(prompt("count+these+numbers:+2%2B5-10%2B8=?"),10);|code-block|syntax|javascript|1441450|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I'd suggest:

<pre><code>var number = parseInt(prompt("count these numbers: 2+5-10+8=?"),10);
</code></pre>

blocks|key|1441462|text|当您执行“===”比较时，它将检查类型是否完全匹配，在本例中，您将检查数字5是否等于字符串5(或他们输入的任何其他值)，这是假的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1441463|您需要将答案解析为整数，正如David+Thomas已经建议的那样：|1441464|var+number+=+parseInt(prompt("count+these+numbers:+2%2B5-10%2B8=?"));|code-block|syntax|javascript|1441465|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

When you do a '===' comparison, it checks if the types exactly match up, and in this case youre checking if the NUMBER 5 is equal to the STRING 5 (or whatever else they entered), which is false.

You need to parse the answer into an integer, as David Thomas has already suggested:

<pre><code>var number = parseInt(prompt("count these numbers: 2+5-10+8=?"));
</code></pre>

blocks|key|1441489|text|简单的答案是使用==而不是严格相等的===。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1441490|不要使用parseInt，因为它会将5iasd转换为5，所以你要么接受错误的答案，要么需要额外的测试。|1441491|不要使用parseFloat，因为它不是必需的。使用==意味着以下所有条件都返回true：|1441492|var+n+=+5;

n+==+'5'
n+==+'5.0'
n+==+'5e0'
n+==+'0.5e1'|code-block|syntax|javascript|1441493|诸若此类。|1441494|哦，作为参考，您应该了解ECMAScript+Abstract+Equality+Comparison+Algorithm是如何工作的。|1441495|entityMap|0|LINK|mutability|MUTABLE|url|http://es5.github.com/#x11.9.3^0|8|2|I|3|0|4|8|I|5|Q|1|0|4|A|Q|2|0|0|0|N|12|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]|$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1C|8|@$9|1D|A|1E|B|C]|$9|1F|A|1G|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|1H|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1I|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1J|8|@]|D|@$9|1K|A|1L|1|1M]]|E|$]]|$1|S|3|-4|5|6|7|1N|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]]]

The simple answer is to use <code>==</code> instead of strict equality <code>===</code>.

Don't use <code>parseInt</code> as it will convert say <code>5iasd</code> to <code>5</code>, so you'll either accept incorrect answers or need an extra test.

Don't use <code>parseFloat</code> as it isn't required. Using <code>==</code> means that all of the following return true:

<pre><code>var n = 5;

n == '5'
n == '5.0'
n == '5e0'
n == '0.5e1'
</code></pre>

and so on. 

Oh, for reference, you should learn how the ECMAScript <a href="http://es5.github.com/#x11.9.3" rel="nofollow">Abstract Equality Comparison Algorithm</a> works.

blocks|key|3757010|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3757011|ScriptManager.RegisterStartupScript(this,+GetType(),+"alertmsg",+"alert('your+message');",+true);|code-block|syntax|javascript|3757012|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this one:

<pre><code>ScriptManager.RegisterStartupScript(this, GetType(), "alertmsg", "alert('your message');", true);
</code></pre>

I am new to JavaScript. This is my second day to start actual learning of JavaScript. I don't know if it is appropriate place to ask this question because there are so many guidelines and standards to follow.

Well, here what I wrote a little script and it is not working. When <code>value &lt; 5 &amp;&amp; value &gt; 5</code> it is showing alerts. But when someone gave the answer 5 (which is the correct answer). It is not showing any alert? I tried myself to resolve this problem but I couldn't resolve this problem. Here is my code: 

<pre><code>&lt;script type="text/javascript"&gt; 
 var number = prompt("count these numbers: 2+5-10+8=?");
 if( number === 5 ) {
 alert( "Congratulations Your Answer is Correct" );
 }
 else if ( number &gt; 5 ) {
 alert( "Your answer is a little higher." );
 }
 else if ( number &lt; 5 ) {
 alert( "Your answer is little lower than actual answer." );
 }
&lt;/script&gt;
</code></pre>

JavaScript: Alert not working in the script

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我是JavaScript的新手。这是我开始实际学习JavaScript的第二天。我不知道问这个问题是否合适，因为有太多的指导方针和标准需要遵循。好吧，这是我写的一个小脚本，它不工作。当为value < 5 && value > 5时，它会显示警报。但是当有人给出答案5(这是正确的答案)时。它没有显示任何警报吗？我试着解...

问JavaScript:警报在脚本中不起作用
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