Check out example codes for "unity separator in inspector". It will help you in understanding the concepts better.

Code Example 1

using UnityEngine;

public class Example : MonoBehaviour
{
	//Use this PropertyAttribute to add a header above some fields in the Inspector.
    [Header("Hi there!")]
    
    //Space between variables 
    [Space(10)]
    
    //Attribute used to make a float or int variable in a script be restricted to a specific range.
 	//public RangeAttribute(float min, float max);
    [Range(5,9)]

    public string playerName = "Unnamed";
}

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