<html lang="en"> <head> <title>Handling Errors - GNU Octave</title> <meta http-equiv="Content-Type" content="text/html"> <meta name="description" content="GNU Octave"> <meta name="generator" content="makeinfo 4.13"> <link title="Top" rel="start" href="index.html#Top"> <link rel="up" href="Errors-and-Warnings.html#Errors-and-Warnings" title="Errors and Warnings"> <link rel="next" href="Handling-Warnings.html#Handling-Warnings" title="Handling Warnings"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <meta http-equiv="Content-Style-Type" content="text/css"> <style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller } span.sc { font-variant:small-caps } span.roman { font-family:serif; font-weight:normal; } span.sansserif { font-family:sans-serif; font-weight:normal; } --></style> </head> <body> <div class="node"> <a name="Handling-Errors"></a> <p> Next: <a rel="next" accesskey="n" href="Handling-Warnings.html#Handling-Warnings">Handling Warnings</a>, Up: <a rel="up" accesskey="u" href="Errors-and-Warnings.html#Errors-and-Warnings">Errors and Warnings</a> <hr> </div> <h3 class="section">12.1 Handling Errors</h3> <p>An error is something that occurs when a program is in a state where it doesn't make sense to continue. An example is when a function is called with too few input arguments. In this situation the function should abort with an error message informing the user of the lacking input arguments. <p>Since an error can occur during the evaluation of a program, it is very convenient to be able to detect that an error occurred, so that the error can be fixed. This is possible with the <code>try</code> statement described in <a href="The-try-Statement.html#The-try-Statement">The try Statement</a>. <ul class="menu"> <li><a accesskey="1" href="Raising-Errors.html#Raising-Errors">Raising Errors</a> <li><a accesskey="2" href="Catching-Errors.html#Catching-Errors">Catching Errors</a> <li><a accesskey="3" href="Recovering-From-Errors.html#Recovering-From-Errors">Recovering From Errors</a> </ul> </body></html>