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Document && and ||

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ridiculousfish
2018-03-04 20:17:28 -08:00
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@@ -420,17 +420,23 @@ echo chips
\section tut_combiners Combiners (And, Or, Not)
Unlike other shells, `fish` does not have special syntax like && or || to combine commands. Instead it has commands `and`, `or`, and `not`.
fish supports the familiar `&&` and `||` to combine commands, and `!` to negate them:
\fish{cli-dark}
>_ cp file1.txt file1_bak.txt; and echo "Backup successful"; or echo "Backup failed"
>_ ./configure && make && sudo make install
\endfish
fish also supports `and`, `or`, and `not`. The first two are job modifiers and have lower precedence. Example usage:
\fish{cli-dark}
>_ cp file1.txt file1_bak.txt && cp file2.txt file2_bak.txt ; and echo "Backup successful"; or echo "Backup failed"
<outp>Backup failed</outp>
\endfish
As mentioned in <a href="#tut_semicolon">the section on the semicolon</a>, this can also be written in multiple lines, like so:
\fish
cp file1.txt file1_bak.txt
cp file1.txt file1_bak.txt && cp file2.txt file2_bak.txt
and echo "Backup successful"
or echo "Backup failed"
\endfish