How to pass a float value from another script?

I’ve been working on a simple clicker game and I want to make an upgrade button that is not interactable if a float value of the price in the button is greater than the float value of gold you have. Here are the important bits of my code:

The first script has the float value of gold

public float gold = 0.00f;

The second one has a public float of the upgrade cost that is later assigned a value. It’s supposed to compare the cost float in script #2 to the gold float in script #1 in an if statement and I have no idea how to link the float value from script #1.

public float cost;

void Update(){ 
                       if (cost > gold)
			         buyitem.interactable= false;
		           else
                     buyitem.interactable = true;

Thanks in advance and sorry if what I’ve written is unclear.

Create a variable for Script 1 in Script 2

public Script1 script1;
//Assign variable in inspector.

script1.gold
// Get Gold variable