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<div class="textblock"><p>Section: <a class="el" href="sec_flow.html">Flow Control</a> </p>
<h1><a class="anchor" id="Usage"></a>
Usage</h1>
<p>The <code>for</code> loop executes a set of statements with an index variable looping through each element in a vector. The syntax of a <code>for</code> loop is one of the following: </p>
<pre class="fragment"> for (variable=expression)
statements
end
</pre><p> Alternately, the parenthesis can be eliminated </p>
<pre class="fragment"> for variable=expression
statements
end
</pre><p> or alternately, the index variable can be pre-initialized with the vector of values it is going to take: </p>
<pre class="fragment"> for variable
statements
end
</pre><p> The third form is essentially equivalent to <code>for variable=variable</code>, where <code>variable</code> is both the index variable and the set of values over which the for loop executes. See the examples section for an example of this form of the <code>for</code> loop. </p>
<h1><a class="anchor" id="Examples"></a>
Examples</h1>
<p>Here we write <code>for</code> loops to add all the integers from <code>1</code> to <code>100</code>. We will use all three forms of the <code>for</code> statement.</p>
<pre class="fragment">--> accum = 0;
--> for (i=1:100); accum = accum + i; end
--> accum
ans =
5050
</pre><p>The second form is functionally the same, without the extra parenthesis</p>
<pre class="fragment">--> accum = 0;
--> for i=1:100; accum = accum + i; end
--> accum
ans =
5050
</pre><p>In the third example, we pre-initialize the loop variable with the values it is to take</p>
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