only updating number vars once

when i have a variable reaching a certain number using an if statement, when it does it adds onto another number var (RoundNo += 1;) but it updates every frame the need( if(Spawned == SpawnRoundTotal){ ) is met, how can i make it only update the first frame where the need is met instead of every frame


Use a boolean:

var roundNum : int;
var roundAdded : Boolean = false;

function Update () {
       if(Spawned == SpawnRoundTotal) {
       //you made this conditional.  
             if(!roundAdded) {
             //Check to see if the Boolean is false.
                    //If it is, add 1 and switch the value of the bool so that it is true.
                    roundAdded = true;