From 074785cea106179cb3305637055ab0a009ca74f2 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:42:52 -0500
Subject: initial commit

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+---
+title: 'RangeError: precision is out of range'
+slug: Web/JavaScript/Reference/Errors/Precision_range
+tags:
+  - Erro
+  - Erros
+  - JavaScript
+  - RangeError
+translation_of: Web/JavaScript/Reference/Errors/Precision_range
+---
+<div>{{jsSidebar("Errors")}}</div>
+
+<p>A exceção JavaScript "precision is out of range" (precisão fora de alcance) ocorre quando um número que está fora do intervalo que vai de 0 à 20 (ou 21) foi passado para <code>toFixed</code> ou <code>toPrecision</code>.</p>
+
+<h2 id="Mensagem">Mensagem</h2>
+
+<pre class="syntaxbox">RangeError: The number of fractional digits is out of range (Edge)
+RangeError: The precision is out of range (Edge)
+RangeError: precision {0} out of range (Firefox)
+RangeError: toExponential() argument must be between 0 and 20 (Chrome)
+RangeError: toFixed() digits argument must be between 0 and 20 (Chrome)
+RangeError: toPrecision() argument must be between 1 and 21 (Chrome)
+</pre>
+
+<h2 id="Tipo_de_erro">Tipo de erro</h2>
+
+<p>{{jsxref("RangeError")}}</p>
+
+<h2 id="O_que_houve_de_errado">O que houve de errado?</h2>
+
+<p>Existe um argumento de precisão fora do intervalo em um desses métodos:</p>
+
+<ul>
+ <li>{{jsxref("Number.prototype.toExponential()")}}</li>
+ <li>{{jsxref("Number.prototype.toFixed()")}}</li>
+ <li>{{jsxref("Number.prototype.toPrecision()")}}</li>
+</ul>
+
+<p>Po padrão, o intervalo permitido para os métodos acima é de 0 à 20 (ou 21). Todavia, a especificação ECMAScript nos permite extender o intervalo.</p>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Método</th>
+   <th scope="col">Firefox (SpiderMonkey)</th>
+   <th scope="col">Chrome, Opera (V8)</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{jsxref("Number.prototype.toExponential()")}}</td>
+   <td>0 to 100</td>
+   <td>0 to 20</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("Number.prototype.toFixed()")}}</td>
+   <td>-20 to 100</td>
+   <td>0 to 20</td>
+  </tr>
+  <tr>
+   <td>{{jsxref("Number.prototype.toPrecision()")}}</td>
+   <td>1 to 100</td>
+   <td>1 to 21</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Exemplos">Exemplos</h2>
+
+<h3 id="Casos_inválidos">Casos inválidos</h3>
+
+<pre class="brush: js example-bad">77.1234.toExponential(-1);  // RangeError
+77.1234.toExponential(101); // RangeError
+
+2.34.toFixed(-100);         // RangeError
+2.34.toFixed(1001);         // RangeError
+
+1234.5.toPrecision(-1);     // RangeError
+1234.5.toPrecision(101);    // RangeError
+</pre>
+
+<h3 id="Casos_válidos">Casos válidos</h3>
+
+<pre class="brush: js example-good">77.1234.toExponential(4); // 7.7123e+1
+77.1234.toExponential(2); // 7.71e+1
+
+2.34.toFixed(1); // 2.3
+2.35.toFixed(1); // 2.4 (perceba que ele foi arredondado nesse caso)
+
+5.123456.toPrecision(5); // 5.1235
+5.123456.toPrecision(2); // 5.1
+5.123456.toPrecision(1); // 5
+</pre>
+
+<h2 id="Veja_também">Veja também</h2>
+
+<ul>
+ <li>{{jsxref("Number.prototype.toExponential()")}}</li>
+ <li>{{jsxref("Number.prototype.toFixed()")}}</li>
+ <li>{{jsxref("Number.prototype.toPrecision()")}}</li>
+</ul>
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