$VAR:VAL

Input variables must start with a $ sign and be placed before any of the actual code in a script. They define a variable named VAR with a default value of VAL which may be of type int, float or string.

Input variables will show up in a unit's Script Settings when selected in the editor, this allows the editor to place the unit with a different value than the default specified in the script itself, but also allows the the value to be changed at any moment in time.

Input variables are created at the same time as the unit itself (even if the game is paused and the script hasn't executed once) and assigned either the default value VAL (which may be overwritten if the initParams of a CreateUnit call specify it), or a value specified in the editor through the Script Settings.

# input vars go at the top of a script, before the actual code
$amt:1 
$text:"abc"
$e:2.71828
 
SetCreeper(10 10 <-amt)