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vendor/phpoffice/math/docs/usage/elements/numeric.md

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+## Usage
+
+To create a numeric, use the `PhpOffice\Math\Element\Numeric` class.
+
+### Methods
+#### getValue
+
+The method has no parameter.
+
+#### setValue
+
+The method has one parameter : 
+
+* `float` **$value**
+
+## Example
+
+### Math
+<math display="block">
+  <mn>3</mn>
+</math>
+
+### XML
+``` xml
+<math display="block">
+  <mn>3</mn>
+</math>
+```
+
+### PHP
+
+``` php
+<?php
+
+use PhpOffice\Math\Element;
+use PhpOffice\Math\Math;
+
+$math = new Math();
+
+$identifier = new Element\Numeric(3);
+
+$math->add($identifier);
+```