$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)  ==>  ""