how to add header and sub-headers in unity inspector code example

Example 1: header in inspector unity

[Header("Health")]
public int health = 100;

Example 2: unity inspector header attribute

//HEADER ATTRIBUTE

using UnityEngine;

public class Example : MonoBehaviour
{
    [Header("Health Settings")]
    public int health = 0;
    public int maxHealth = 100;

    [Header("Shield Settings")]
    public int shield = 0;
    public int maxShield = 0;
}