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<title>EAGLE Help: Identifiers</title>
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<i>EAGLE Help</i>
<h1><center>Identifiers</center></h1>
<hr>
An <i>identifier</i> is a name that is used to introduce a user defined
<a href=198.htm>constant</a>,
<a href=199.htm>variable</a> or
<a href=200.htm>function</a>.
<p>
Identifiers consist of a sequence of letters (<tt>a b c</tt>..., <tt>A B C</tt>...),
digits (<tt>1 2 3</tt>...) and underscores (<tt>_</tt>). The first character
of an identifier <b>must</b> be a letter or an underscore.
<p>
Identifiers are case-sensitive, which means that
<pre>
int Number, number;
</pre>
would define two <b>different</b> integer variables.
<p>
The maximum length of an identifier is 100 characters, and all of these
are significant.
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