fish-shell/sphinx_doc_src/cmds/if.rst

if - conditionally execute a command
==========================================

Synopsis
--------

if CONDITION; COMMANDS_TRUE...;
[else if CONDITION2; COMMANDS_TRUE2...;]
[else; COMMANDS_FALSE...;]
end


Description
------------

`if` 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 `else` is given, `COMMANDS_FALSE` will be executed.

You can use <a href="#and">`and`</a> or <a href="#or">`or`</a> in the condition. See the second example below.

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.

Example
------------

The following code will print `foo.txt exists` if the file foo.txt exists and is a regular file, otherwise it will print `bar.txt exists` if the file bar.txt exists and is a regular file, otherwise it will print `foo.txt and bar.txt do not exist`.



::

    if test -f foo.txt
        echo foo.txt exists
    else if test -f bar.txt
        echo bar.txt exists
    else
        echo foo.txt and bar.txt do not exist
    end


The following code will print "foo.txt exists and is readable" if foo.txt is a regular file and readable


::

    if test -f foo.txt
       and test -r foo.txt
       echo "foo.txt exists and is readable"
    end