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\section or or - Conditionally execute a command
\subsection or-synopsis Synopsis
<tt>or COMMAND1; COMMAND2</tt>
\subsection or-description Description
The \c or builtin is used to execute one command, and if it returns
non-zero status, also execute a second command.
\subsection or-example Example
The following code runs the \c make command to build a program, or if it fails, it runs <tt>make clean</tt>, which removes the files created by the build process
<pre>
or make; make clean
</pre>
\c or and \c and can be nested, as in this example, that attempts to build and install a program, and removed the files created by the build process on failiure
<pre>
or and make; make install; make clean
</pre>
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