Check out example codes for "html space tag". It will help you in understanding the concepts better.

Code Example 1

 

Code Example 2

<button type="submit" value="submit" name="submit" style="margin-bottom: 20px;">The style makes a space
</button>

Code Example 3

non-breaking space	= &nbsp;
<	less than =	&lt;
>	greater than =	&gt;
&	ampersand =	&amp;

Code Example 4

&nbsp;  <!-- 1 space -->
&ensp;	<!-- tab; 2 space -->
&emsp;	<!-- tab; 4 space -->

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