html space

    <!-- 1 space -->
 	<!-- tab; 2 space -->
 	<!-- tab; 4 space -->	non-breaking space	=  
<	less than =	<
>	greater than =	>
&	ampersand =	&    <button type="submit" value="submit" name="submit" style="margin-bottom: 20px;">The style makes a space
</button><br/># in CSS means your looking at an ID so 
<div class="ExampleClass" id="ExampleID"></div>

#ExampleID would reference the ID
.ExampleClass would reference the class