How do I tell another script to skip its routine for one frame?

I’m simulating gravity in space using Newton’s law of gravitation.
How I’m going about it is by making a script Gravity that has a static list of Gravity classes that consists of all the objects containing the script Gravity in the scene.
Then I go through the list and run the function Gravitate() on each of them and feed into it all of the objects so that it can calculate a gravitational force for itself.

My question is: how do I go about this without running the same operation for each of the object that is effecting each other.
In other words, how do I calculate the force for my object, tell the other object its force as well and tell it not to run its own function as I’ve already calculated its force?

I thought I could somehow use coroutines for this but I’m not experienced enough. Telling the other script to skip this frame or something like that.

you maybe need a static bool flag in Gravity.cs

	// put this in Gravity.cs
	public static bool isCalculate;
	// and somewhere
	void Foo() {
		for (int i = 0; i < gravityList.Length; i++) {
			if (Gravity.isCalculate) {
				if (i == gravityList.Length - 1) {
					Gravity.isCalculate = false;
			} else {
				// Calculate and set Gravity.isCalculate = true