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

Code Example 1

using UnityEngine;

public class Example : MonoBehaviour
    // Make the variable p not show up in the inspector
    // but be serialized.
    int p = 5;

Code Example 2

public float myVar;

Code Example 3

public float notHidden; // Displayed
[HideInInspector] // Hides var below
public float hidden;

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