How to show plus and minus sign when subtracting two variables: : <p>How to show plus and minus sign when subtracting two variables:Following codes shows -1, that is fine but when the value is positive then it is not showing +sign.</p>

<pre><code>$gf=5;
$ga=6;
$gd=$gf-$ga;
echo $gd;
</code></pre>
