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<title>EAGLE Help: for</title>
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<hr>
<i>EAGLE Help</i>
<h1><center>for</center></h1>
<hr>
The <i>for</i> statement has the general syntax
<pre>
for ([init]; [test]; [inc]) statement
</pre>
and performs the following steps:
<ol>
<li>If an initializing expression <tt>init</tt> is present, it is executed.
<li>If a <tt>test</tt> expression is present, it is executed. If the result
is nonzero (or if there is no <tt>test</tt> expression at all), the
<tt>statement</tt> is executed.
<li>If an <tt>inc</tt> expression is present, it is executed.
<li>Finally control returns to step 2.
</ol>
If there is no
<tt><a href=219.htm>break</a></tt> or
<tt><a href=224.htm>return</a></tt>
inside the <tt>statement</tt>, the <tt>inc</tt> expression (or the
<tt>statement</tt>) must affect
the value of the <tt>test</tt> expression, or <tt>test</tt> itself must
change during evaluation in order to avoid an endless loop.
<p>
The initializing expression <tt>init</tt> normally initializes one or more
loop counters. It may also define a new variable as a loop counter.
The scope of such a variable is valid until the end of the active block.
<p>
<b>Example</b>
<pre>
string s = "Trust no one!";
int sum = 0;
for (int i = 0; s[i]; ++i)
sum += s[i]; // sums up the characters in s
</pre>
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