//a character entity looks like this:
&entity_name;
//or
&#entity_number;
Are used to display reserved characters in HTML.
Entity names are case sensitive.
To display a less than sign (<) we must write: < or <.
Combining Diacritical Marks
A diacritical mark is a "glyph" added to a letter.
Diacritical marks can be used in combination with alphanumeric characters to produce a character that is not present in the character set (encoding) used in the page.
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