blocks|key|1646607|text|parseInt()将强制它为整数类型，或者如果它不能执行转换，则将为NaN+(而不是数字)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1646608|var+currentValue+=+parseInt($("#replies").text(),10);|code-block|syntax|javascript|1646609|第二个参数(基数)确保它被解析为十进制数。|1646610|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

parseInt() will force it to be type integer, or will be NaN (not a number) if it cannot perform the conversion. 

<pre><code>var currentValue = parseInt($("#replies").text(),10);
</code></pre>

The second paramter (radix) makes sure it is parsed as a decimal number.

blocks|key|1431775|text|Parse+int是您在这里应该使用的工具，但与任何工具一样，它也应该被正确使用。使用parseInt时，应始终使用基数参数以确保使用正确的基数|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1431776|var+currentValue+=+parseInt($("#replies").text(),10);|code-block|syntax|javascript|1431777|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|$]]

Parse int is the tool you should use here, but like any tool it should be used correctly. When using parseInt you should always use the radix parameter to ensure the correct base is used

<pre><code>var currentValue = parseInt($("#replies").text(),10);
</code></pre>

blocks|key|1646644|text|整数将被转换为字符串，而不是相反。您需要：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1646645|var+newValue+=+parseInt(currentValue)+%2B+1|code-block|syntax|javascript|1646646|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|$]]

The integer is being converted into a string rather than vice-versa. You want:

<pre><code>var newValue = parseInt(currentValue) + 1
</code></pre>

blocks|key|1431832|text|在IE中parseInt对我不起作用。所以我简单地对你想要作为整数的变量使用了%2B。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1431833|var+currentValue+=+$("#replies").text();
var+newValue+=+%2BcurrentValue+%2B+1;
$("replies").text(newValue);|code-block|syntax|javascript|1431834|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|$]]

parseInt didn't work for me in IE. So I simply used + on the variable you want as an integer.

<pre><code>var currentValue = $("#replies").text();
var newValue = +currentValue + 1;
$("replies").text(newValue);
</code></pre>

blocks|key|1646715|text|关于对.js的八进制曲解-我只是用了这个...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1646716|parseInt(parseFloat(nv))|code-block|syntax|javascript|1646717|在测试了前导零之后，每次都会返回正确的表示。|1646718|希望这能有所帮助。|1646719|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In regards to the octal misinterpretation of .js - I just used this...

<pre><code>parseInt(parseFloat(nv))
</code></pre>

and after testing with leading zeros, came back everytime with the correct representation.

hope this helps.

blocks|key|1646670|text|要递增1，您可以执行以下操作|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1646671|++var+newValue+=+currentValue+%2B%2B;|code-block|syntax|javascript|1646672|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|$]]

to increment by one you can do something like 

<pre><code> var newValue = currentValue ++;
</code></pre>

blocks|key|1646732|text|你的代码应该是这样的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1646733|<span+id="replies">8

var+currentValue+=+$("#replies").text();
var+newValue+=+parseInt(parseFloat(currentValue))+%2B+1;
$("replies").text(newValue);|code-block|syntax|javascript|1646734|Hacks+N+Tricks|offset|length|1646735|entityMap|0|LINK|mutability|MUTABLE|url|http://rajeevcse04.blogspot.com/^0|0|0|0|E|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Your code should like this:

<pre><code>&lt;span id="replies"&gt;8&lt;/span&gt;

var currentValue = $("#replies").text();
var newValue = parseInt(parseFloat(currentValue)) + 1;
$("replies").text(newValue);
</code></pre>

<a href="http://rajeevcse04.blogspot.com" rel="nofollow">Hacks N Tricks</a>

blocks|key|1431879|text|简单地，在文本值之前添加一个加号|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1431880|var+newValue+=+%2BcurrentValue+%2B+1;|code-block|syntax|javascript|1431881|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|$]]

Simply, add a plus sign before the text value

<pre class="lang-js prettyprint-override"><code>var newValue = +currentValue + 1;
</code></pre>

blocks|key|1646780|text|var+month+=+new+Date().getMonth();
var+newmon+=+month+%2B+1;
$('#month').html((newmon+<+10+?+'0'+:+'')+%2B+newmon+);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1646781|我简单地修复了你的月份问题，getMonth数组从0开始到11。|unstyled|1646782|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>var month = new Date().getMonth();
var newmon = month + 1;
$('#month').html((newmon &lt; 10 ? '0' : '') + newmon );
</code></pre>

I simply fixed your month issue, getMonth array start from 0 to 11.

blocks|key|1431949|text|您可以将变量乘以1，以强制JavaScript将变量转换为数字，然后将其与其他值相加。这之所以有效，是因为乘法不像加法那样重载。有些人可能会说这不像parseInt那么清楚，但这是一种方法，而且还没有被提及。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1431950|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You can multiply the variable by 1 to force JavaScript to convert the variable to a number for you and then add it to your other value. This works because multiplication isn't overloaded as addition is. Some may say that this is less clear than parseInt, but it is a way to do it and it hasn't been mentioned yet.

blocks|key|1646951|text|在javascript中可以使用parseInt()方法将字符串转换为整数|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1646952|您只需像这样更改代码|1646953|$("replies").text(parseInt($("replies").text(),10)+%2B+1);|code-block|syntax|javascript|1646954|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|$]]

You can use parseInt() method to convert string to integer in javascript

You just change the code like this

<pre><code>$("replies").text(parseInt($("replies").text(),10) + 1);
</code></pre>

I have a simple html block like:

<pre><code>&lt;span id="replies"&gt;8&lt;/span&gt;
</code></pre>

Using jquery I'm trying to add a 1 to the value (8).

<pre><code>var currentValue = $("#replies").text();
var newValue = currentValue + 1;
$("replies").text(newValue);
</code></pre>

What's happening is it is appearing like:

81

then

811

not 9, which would be the correct answer. What am I doing wrong?

How do I add an integer value with javascript (jquery) to a value that's returning a string?

我有一个简单的html块，如下所示：8使用jquery，我尝试将值(8)加1。var currentValue = $("#replies").text();var newValue = currentValue + 1;$("replies").text(newValue);实际情况是，它看起来像这样：81然后811而不是9，这将是正确的答案。

问如何使用javascript (jquery)将整数值与返回字符串的值相加？
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问如何使用javascript (jquery)将整数值与返回字符串的值相加？EN

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