Why you should use & instead of &

choose a link:

lousy coding:
href="amp.php?id=1&pound=2&cent=3&reg=4&deg=5&quot=6&copy=7&lt=8&sect=9&yen=10&laquo=11&raquo=12&gt=13&dummy=14"
proper coding:
href="amp.php?id=1&pound=2&cent=3&reg=4&deg=5&quot=6&copy=7&lt=8&sect=9&yen=10&laquo=11&raquo=12&gt=13amp;dummy=14"

This is an illustration for Who cares about ampersands.