Simple arithmetic in PHP
<p>Here is a simple php program which gives a strange output. Can anyone explain why it is coming like this and how to get the expected output?</p>

<pre><code>&lt;?php
$a=2;$b=3;

echo "&lt;br&gt; ADD:".$a+$b;
echo "&lt;br&gt; SUB:".$a-$b;
echo "&lt;br&gt; MUL:".$a*$b;
echo "&lt;br&gt; DIV:".$a/$b;
?&gt;
</code></pre>

<p>Output:</p>

<pre><code>3-3
MUL:6
DIV:0.66666666666667
</code></pre>

<p>Expected Output:</p>

<pre><code>ADD:5
SUB:-1
MUL:6
DIV:0.66666666666667
</code></pre>
