Q2011 I keep hearing about character codes, what are they?

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Q2011 I keep hearing about character codes, what are they?

HTML reserves certain characters (&, ", <, and >) for the use of HTML. When the character codes are not used in place of the actual symbol, you will receive errors when validating, and unexpected results in some browsers. For a listing of character codes accepted into the 3.2 HTML Standard:

Numeric Code Character Entities

Keep in mind that the use of the numeric codes rather than text codes are more reliable.