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Diffstat (limited to 'doc_src/while.txt')
| -rw-r--r-- | doc_src/while.txt | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/doc_src/while.txt b/doc_src/while.txt index 3a59afc5..6b2bebb0 100644 --- a/doc_src/while.txt +++ b/doc_src/while.txt @@ -1,13 +1,19 @@ \section while while - perform a command multiple times \subsection while-synopsis Synopsis -<tt>while CONDITION; COMMANDS; end</tt> +<tt>while CONDITION; COMMANDS...; end</tt> \subsection while-synopsis Synopsis -The <tt>while</tt> builtin causes fish to continually execute the command COMMANDS while the command CONDITION returns with status 0. +The <tt>while</tt> builtin causes fish to continually execute CONDITION and +execute COMMANDS as long as CONDITION returned with status 0. If CONDITION is +false on the first time, COMMANDS will not be executed at all. Hints: use +<a href="#begin"><tt>begin; ...; end</tt></a> for complex conditions; more +complex control can be achieved with <tt>while true</tt> containing a +<a href="#break">break</a>. \subsection while-example Example <tt>while test -f foo.txt; echo file exists; sleep 10; end</tt> -causes fish to print the line 'file exists' at 10 second intervals as long as the file foo.txt exists. +causes fish to print the line 'file exists' at 10 second intervals as long as +the file foo.txt exists. |