Calculated data formula?

[join]

Hello im trying to write a formula to calculate how manny users out of a certain group of users has a service sate = 3.

My thoughts were something like this but it doesnt seem to work at all, cant even get started cuz it wont accept my array.
(This is just an example of my train o' thoughts)

var ServiceState = new Array();
ServiceState[0] = AGENT1_SERVICESTATE;
ServiceState[1] = AGENT1_SERVICESTATE;
ServiceState[2] = AGENT1_SERVICESTATE;

int paused = 0;

for (var i=0;i<ServiceState.lenght;i++){
if (ServiceState = 3){
paused++;
}
}


Thanks in advance,
Joakim