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diff --git a/files/ca/web/javascript/reference/global_objects/math/abs/index.html b/files/ca/web/javascript/reference/global_objects/math/abs/index.html new file mode 100644 index 0000000000..34d3e5beb9 --- /dev/null +++ b/files/ca/web/javascript/reference/global_objects/math/abs/index.html @@ -0,0 +1,129 @@ +--- +title: Math.abs() +slug: Web/JavaScript/Referencia/Objectes_globals/Math/abs +translation_of: Web/JavaScript/Reference/Global_Objects/Math/abs +--- +<div>{{JSRef("Global_Objects", "Math")}}</div> + +<h2 id="Summary" name="Summary">Resum</h2> + +<p>La funció <strong><code>Math.abs()</code></strong> retorna el valor absolut d'un nombre. És a dir:</p> + +<p><math display="block"><semantics><mrow><mstyle mathvariant="monospace"><mrow><mo lspace="0em" rspace="thinmathspace">Math.abs</mo><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo></mrow></mstyle><mo>=</mo><mrow><mo stretchy="false">|</mo><mi>x</mi><mo stretchy="false">|</mo></mrow><mo>=</mo><mrow><mo>{</mo><mtable columnalign="left left"><mtr><mtd><mi>x</mi></mtd><mtd><mtext>if</mtext><mspace width="1em"></mspace><mi>x</mi><mo>></mo><mn>0</mn></mtd></mtr><mtr><mtd><mi>0</mi></mtd><mtd><mtext>if</mtext><mspace width="1em"></mspace><mi>x</mi><mo>=</mo><mn>0</mn></mtd></mtr><mtr><mtd><mo>-</mo><mi>x</mi></mtd><mtd><mtext>if</mtext><mspace width="1em"></mspace><mi>x</mi><mo><</mo><mn>0</mn></mtd></mtr></mtable></mrow></mrow><annotation encoding="TeX">{\mathtt{\operatorname{Math.abs}(x)}} = {|x|} = \begin{cases} x & \text{if} \quad x \geq 0 \\ -x & \text{if} \quad x < 0 \end{cases} </annotation></semantics></math></p> + +<h2 id="Syntax" name="Syntax">Sintaxi</h2> + +<pre class="syntaxbox"><code>Math.abs(<var>x</var>)</code></pre> + +<h3 id="Parameters" name="Parameters">Paràmetres</h3> + +<dl> + <dt><code>x</code></dt> + <dd>Un nombre.</dd> +</dl> + +<h2 id="Description" name="Description">Descripció</h2> + +<p>Degut a que <code>abs()</code> és un mètode estàtic de <code>Math</code>, sempre s'utilitza com a <code>Math.abs()</code>, en comptes de com a mètode d'una instància de <code>Math</code> (<code>Math</code> no és un constructor).</p> + +<h2 id="Examples" name="Examples">Exemples</h2> + +<h3 id="Example:_Math.abs_behavior" name="Example:_Math.abs_behavior">Exemple: Comportament de <code>Math.abs()</code></h3> + +<p>Si li passem una string no numèric o bé una variable {{jsxref("undefined")}}/buida retorna {{jsxref("NaN")}}. Passar {{jsxref("null")}} retorna 0.</p> + +<pre class="brush: js">Math.abs('-1'); // 1 +Math.abs(-2); // 2 +Math.abs(null); // 0 +Math.abs('string'); // NaN +Math.abs(); // NaN +</pre> + +<h2 id="Specifications" name="Specifications">Especificacions</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Especificació</th> + <th scope="col">Estat</th> + <th scope="col">Comentaris</th> + </tr> + <tr> + <td>ECMAScript 1a Edició.</td> + <td>Standard</td> + <td>Definició inicial. Implementat a JavaScript 1.0.</td> + </tr> + <tr> + <td>{{SpecName('ES5.1', '#sec-15.8.2.1', 'Math.abs')}}</td> + <td>{{Spec2('ES5.1')}}</td> + <td> </td> + </tr> + <tr> + <td>{{SpecName('ES6', '#sec-math.abs', 'Math.abs')}}</td> + <td>{{Spec2('ES6')}}</td> + <td> </td> + </tr> + </tbody> +</table> + +<h2 id="Browser_compatibility" name="Browser_compatibility">Compatibilitat amb navegadors</h2> + +<div>{{CompatibilityTable}}</div> + +<div id="compat-desktop"> +<table class="compat-table"> + <tbody> + <tr> + <th>Característica</th> + <th>Chrome</th> + <th>Firefox (Gecko)</th> + <th>Internet Explorer</th> + <th>Opera</th> + <th>Safari</th> + </tr> + <tr> + <td>Suport bàsic</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Característica</th> + <th>Android</th> + <th>Chrome for Android</th> + <th>Firefox Mobile (Gecko)</th> + <th>IE Mobile</th> + <th>Opera Mobile</th> + <th>Safari Mobile</th> + </tr> + <tr> + <td>Suport bàsic</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + </tr> + </tbody> +</table> +</div> + +<h2 id="See_also" name="See_also">Vegeu també</h2> + +<ul> + <li>{{jsxref("Math.ceil()")}}</li> + <li>{{jsxref("Math.floor()")}}</li> + <li>{{jsxref("Math.round()")}}</li> + <li>{{jsxref("Math.sign()")}} {{experimental_inline}}</li> + <li>{{jsxref("Math.trunc()")}} {{experimental_inline}}</li> +</ul> |