blocks|key|1083240|text|使用abs将返回数字的absolute+value|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1083241|-300.abs++#+300
300.abs+++#+300|code-block|syntax|javascript|1083242|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Absolute_value^0|2|3|B|E|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Using <code>abs</code> will return the <a href="http://en.wikipedia.org/wiki/Absolute_value" rel="noreferrer">absolute value</a> of a number

<pre><code>-300.abs # 300
300.abs # 300
</code></pre>

blocks|key|1083273|text|在它前面放一个负号。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1083274|>>+--300
=>+300
>>+x+=+-300
=>+-300
>>+-x
=>+300|code-block|syntax|javascript|1083275|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|$]]

Put a negative sign in front of it.

<pre><code>&gt;&gt; --300
=&gt; 300
&gt;&gt; x = -300
=&gt; -300
&gt;&gt; -x
=&gt; 300
</code></pre>

blocks|key|1298383|text|把它乘以负数不是更容易吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1298384|x+*+-1|code-block|syntax|javascript|1298385|这样你就可以来回移动了。|1298386|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|$]]

Wouldn't it just be easier to multiply it by negative one? 

<pre><code>x * -1
</code></pre>

That way you can go back and forth.

blocks|key|1298435|text|大多数编程语言都有ABS方法，但是也有一些没有。虽然我以前没有使用过Ruby，但我熟悉它是一个运行在PHP上的框架|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1298436|在PHP+https://www.php.net/manual/en/function.abs.php上提供了abs方法。|offset|length|1298437|与Ruby相比，integer.abs+https://www.geeksforgeeks.org/ruby-integer-abs-function-with-example/的语法略有不同|1298438|但是为了将来的参考，abs方法对于你自己来说是非常小的。|1298439|以下是如何在几种不同的语言中：|1298440|JavaScript：|1298441|function+my_abs(integer){
++++if+(integer+<+0){
++++++++return+integer+*+-1;
++++}
++++return+interger;
}|code-block|syntax|javascript|1298442|Python：|1298443|++++def+my_abs(integer):
++++if+(integer+<+0):
++++++++return+integer+*+-1
++++return+integer|1298444|c：|1298445|int+my_abs(int+integer){
++++if+(interger+<+0){
++++++++return+integer+*+-1;
++++}
++++return+integer;
}|1298446|这意味着如果您发现自己使用的编程语言没有内置abs方法，您知道如何编写自己的方法，只需简单地将任何负数乘以-1，就像在我的示例中收集的那样。|1298447|entityMap|0|LINK|mutability|MUTABLE|url|https://www.php.net/manual/en/function.abs.php|1|https://www.geeksforgeeks.org/ruby-integer-abs-function-with-example/^0|0|5|1A|0|0|K|1X|1|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1D|8|@]|9|@$D|1E|E|1F|1|1G]]|A|$]]|$1|F|3|G|5|6|7|1H|8|@]|9|@$D|1I|E|1J|1|1K]]|A|$]]|$1|H|3|I|5|6|7|1L|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1M|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1N|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|1O|8|@]|9|@]|A|$Q|R]]|$1|S|3|T|5|6|7|1P|8|@]|9|@]|A|$]]|$1|U|3|V|5|P|7|1Q|8|@]|9|@]|A|$Q|R]]|$1|W|3|X|5|6|7|1R|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|P|7|1S|8|@]|9|@]|A|$Q|R]]|$1|10|3|11|5|6|7|1T|8|@]|9|@]|A|$]]|$1|12|3|-4|5|6|7|1U|8|@]|9|@]|A|$]]]|13|$14|$5|15|16|17|A|$18|19]]|1A|$5|15|16|17|A|$18|1B]]]]

Most programming languages have the ABS method, however there are some that do not
Whilst I have not used Ruby before, I am familiar its a framework that runs on PHP
The abs method is available on PHP
<a href="https://www.php.net/manual/en/function.abs.php" rel="nofollow noreferrer">https://www.php.net/manual/en/function.abs.php</a>
With Ruby the syntax appears slightly different is integer.abs
<a href="https://www.geeksforgeeks.org/ruby-integer-abs-function-with-example/" rel="nofollow noreferrer">https://www.geeksforgeeks.org/ruby-integer-abs-function-with-example/</a>
But for future reference the abs method is really small to code your self.
here is how in a few different languages:
JavaScript:
<pre><code>function my_abs(integer){
 if (integer &lt; 0){
 return integer * -1;
 }
 return interger;
}
</code></pre>
Python:
<pre><code> def my_abs(integer):
 if (integer &lt; 0):
 return integer * -1
 return integer
</code></pre>
c:
<pre><code>int my_abs(int integer){
 if (interger &lt; 0){
 return integer * -1;
 }
 return integer;
}
</code></pre>
This means should you ever find yourself with a programming language that doesnt have a built in abs method, you know how to code your own its just simply multiply any negative number by -1 as you would of gathered in my examples

What's the simplest way of changing a negative number to positive with ruby?

ie. Change "-300" to "300"

Ruby: Change negative number to positive number?

Python

用ruby把负数改成正数最简单的方法是什么？即。将"-300“更改为"300”

问Ruby:把负数改成正数？
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