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<h3 class="section">10.9 The <code>try</code> Statement</h3>
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<p><a name="index-g_t_0040code_007btry_007d-statement-554"></a><a name="index-g_t_0040code_007bcatch_007d-555"></a><a name="index-g_t_0040code_007bend_005ftry_005fcatch_007d-556"></a>
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In addition to unwind_protect, Octave supports another limited form of
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<p>The general form of a <code>try</code> block looks like this:
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<pre class="example"> try
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<p class="noindent">where <var>body</var> and <var>cleanup</var> are both optional and may contain any
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Octave expressions or commands. The statements in <var>cleanup</var> are
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only executed if an error occurs in <var>body</var>.
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<p>No warnings or error messages are printed while <var>body</var> is
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executing. If an error does occur during the execution of <var>body</var>,
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<var>cleanup</var> can use the function <code>lasterr</code> to access the text
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of the message that would have been printed. This is the same
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as <code>eval (</code><var>try</var><code>, </code><var>catch</var><code>)</code> but it is more efficient since
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the commands do not need to be parsed each time the <var>try</var> and
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<var>catch</var> statements are evaluated. See <a href="Errors-and-Warnings.html#Errors-and-Warnings">Errors and Warnings</a>, for more
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information about the <code>lasterr</code> function.
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