Question
 

What's a param(eter)? I keep seeing these in scripts and such but I have no idea what exactly it is...

It's just a value or an object that you use when you want to transfer information across a system/system(s). They are passed through a function.


On Graal, params are read as an array of values, of which the first value in the sent function would be params[0], the second params[1], etc...

In all languages, when you call a funciton or procedure, you give them arguments
EG

this = that(var1,var2);

var1 and var2 are arguments

in a declaration, they are called paramaters

function that(passed1,passed2) {
whatever;
}

passed1 and passed2 are parameters.


When using triggeraction in gs2, you trigger something on the serverside, then the serverside function has

function onActionServerside(passed1,passed2) {
whatever;
}

however, in the case of a triggered function ONLY, you do not have to define the parameters, so if you did

function onActionServerside() {

and triggered it with parameters, since they were never given name, they will be referred to as param[0], param[1], etc

You don't need to define any parameters when calling the serverside action (in the actual function, I mean, not the trigger), which is what it is -- an action. When you trigger, you trigger to action functions that in turn read any information you sent over as parameters.