\section if if - conditionally execute a command \subsection if-synopsis Synopsis <tt>if CONDITION; COMMANDS_TRUE...; [else; COMMANDS_FALSE...;] end</tt> \subsection if-description Description <tt>if</tt> will execute the command CONDITION. If the condition's exit status is 0, the commands COMMANDS_TRUE will execute. If the exit status is not 0 and <tt>else</tt> is given, COMMANDS_FALSE will be executed. In order to use the exit status of mutiple commands as the condition of an if block, use <a href="#begin"><tt>begin; ...; end</tt></a> and the short circut commands <a href="commands.html#and">and</a> and <a href="commands.html#or">or</a>. The exit status of the last foreground command to exit can always be accessed using the <a href="index.html#variables-status">$status</a> variable. \subsection if-example Example <pre> if test -f foo.txt echo foo.txt exists else echo foo.txt does not exist end </pre> will print <tt>foo.txt exists</tt> if the file foo.txt exists and is a regular file, otherwise it will print <tt>foo.txt does not exist</tt>.