getting a float value from another script

hi all i sort of have 2 questions here, im building a score sytsem much like the one found in angry birds (1, 2 or 3 stars) fist off im trying to get a float value from another script (float parCount = X;) but not sure how to call it?

secondly i wish to make an if statement to say something like if ball goes in hole, get float value and display number of stars depending on number of shots taken.

thsi is the script ive got so far for when the ball goes in the hole but im not sure how to turn this into an if statement.

any ideas would be great

 using UnityEngine;
 using System.Collections;
 
 public class Hole_TouchDestroy : MonoBehaviour {
     void OnTriggerEnter(Collider other) {
         Destroy(other.gameObject);
         
     }
 }