<h3>NOT</h3>
Returns 1 if a is not the same as b.

<h4>Syntax</h4>
<pre> a NOT b </pre>

<h4>Arguments</h4>
None

<h4>Example</h4>
<pre> 'a' IS NOT 'b'  &rarr; returns 1 </pre>
<pre> 'a' IS NOT 'a'  &rarr; returns 0 </pre>
<pre> 4 IS NOT 2+2    &rarr; returns 0 </pre>

