From 0b293a5397c62e1d1a07f42b510d99416131412a Mon Sep 17 00:00:00 2001 From: Holger Schurig Date: Fri, 27 Jun 2014 13:00:17 +0200 Subject: [PATCH] doc: add hint on how to calculate in hush Signed-off-by: Holger Schurig Signed-off-by: Sascha Hauer --- Documentation/user/hush.rst | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/user/hush.rst b/Documentation/user/hush.rst index 2a0e63079..00d4e2983 100644 --- a/Documentation/user/hush.rst +++ b/Documentation/user/hush.rst @@ -50,3 +50,11 @@ example the :ref:`command_echo` command has the ``-a FILE`` option for appending a file and the ``-o FILE`` option for overwriting a file. The readline command requires a variable name as argument in which the line will be stored. + +**NOTE:** hush feels like a normal Unix shell, but it cannot calculate by +itself, i.e. $(($A/2)) won't work. Calculation can however be done +with :ref:`command_let`:: + + A=10 + let B=$A/2 + echo $B