Beginner: For Loop freezing unity

Well, just as it says at the top. I have an empty game object and a script attached to it. The script should loop through some numbers representing coordinates for future objects but as soon as I hit play in unity, the whole program freezes. The function is called from inside Start() and I tried putting a print command inside to verify that it gets to that point but the program freezes completely so nothing is printed to the console anyway. I have to kill it from within task manager every time.

function Start () {
	PlaceStars();
}

function PlaceStars () {
	objectID = 1;
	
	for (zCoordinate = universeRadius; zCoordinate > -universeRadius * 2; zCoordinate++) {
		for (xCoordinate = universeRadius; xCoordinate > -universeRadius * 2; xCoordinate++) {
			//NewStar(xCoordinate, zCoordinate);
			print(xCoordinate + ", " + zCoordinate);
		}
	}
}

The variables are in the right place, of the right type and instantiated already. Ask if you need more details but I can’t think of anything else right now. Thanks for any help in advance.

for (zCoordinate = universeRadius; zCoordinate > -universeRadius * 2; zCoordinate++) {

while zCoordinate is greater than -universeRadius * 2 , zCoordinate ++ .

this would infinitely loop, right?

universeRadius is +ve I assume, zCoordinate = universeRadius is +ve,

while zCoordinate is greater than -universeRadius * 2 : while a +ve value is greater than a -ve value

zCoordinate ++ : the +ve value gets even larger, more +ve ?!

Infinite loop.