$sub¶
Usage: $sub(x,y,*args)
Category: mathematical
Description:
Subtracts y
from x
. Can be used with an arbitrary number of arguments (i.e.: $sub(x,y,z)
= (x - y) - z).
Returns an empty string if an argument is missing or not an integer.
Example:
The following statements will return the values indicated:
$sub(20,15) ==> "5"
$sub(20,-15) ==> "35"
$sub(20,14,1) ==> "5"
$sub(20,10,3,2) ==> "5"
$sub(20,10,3,) ==> ""
$sub(20,10,3,a) ==> ""
$sub(20,10,3.5) ==> ""