QGIS/resources/function_help/tostring

<h3>tostring() function</h3>
Converts a number to string.

<p><h4>Syntax</h4>
     tostring(<i>number</i>)</p>

<p><h4>Arguments</h4>
<!-- List args for functions here-->
<i>number</i> &rarr; is integer or real.  The number to convert to string.</p>

<p><h4>Example</h4>
<!-- Show example of function.-->
     tostring(123) &rarr; '123'</p>