How TO add space in HTML W3Schools code example

Example 1: html space

<!-- Create space in HTMl -->
&nbsp;

<!-- Example: -->
<p> Hello &nbsp; World! </p>

Example 2: # in html

# 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