<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" type="guide" id="variable" lang="ca">

    <info>
        <link type="guide" xref="index#equation"/>
    <credit type="translator copyright"><name>Gil Forcada</name><email>gilforcada@guifi.net</email><years>2012</years></credit><credit type="translator copyright"><name>Joan Duran</name><email>jodufi@gmail.com</email><years>2008, 2009</years></credit><credit type="translator copyright"><name>Pere O.</name><email>gotrunks@gmail.com</email><years>2018</years></credit><credit type="translator copyright"><name>Robert Antoni Buj Gelonch</name><email>rbuj@fedoraproject.org</email><years>2018, 2019</years></credit><credit type="translator copyright"><name>Sergi Morraja</name><email>sergi256@gmail.com</email><years>2011, 2012</years></credit></info>

	<title>Variables</title>
    
    <p>
    To assign a value to a variable use the = symbol or choose the variable to assign to with the <gui>x</gui> button in <link xref="mouse">advanced mode</link>.
    A variable name must only contain upper or lower characters.
    </p>
    <example>
    <p>x=5</p>
    <p>
    value=82
    </p>
    </example>
    <p>
    Variables can be used in any equation and are substituted for their assigned value.
    Variables can be inserted using the <gui>x</gui> button.
    </p>
    <example>
    <p>6x+3</p>
    <p>xy−3x+7y−21</p>
    </example>
    <p>
    The following variables are always defined.
    </p>
    <table>
    <tr>
    <td><p>ans</p></td>
    <td><p>Result of previous calculation</p></td>
    </tr>
    <tr>
    <td><p>e</p></td>
    <td><p><link xref="logarithm">Nombre e</link></p></td>
    </tr>
    <tr>
    <td><p>π</p></td>
    <td><p><link xref="trigonometry">Pi</link></p></td>
    </tr>
    <tr>
    <td><p>rand</p></td>
    <td><p>Random value in the range [0,1] (changes on each read)</p></td>
    </tr>
    </table>
</page>
