unity documentation code example

Example 1: unity requirecomponent

using UnityEngine;// PlayerScript requires the GameObject to have a Rigidbody component
[RequireComponent(typeof(Rigidbody))]
public class PlayerScript : MonoBehaviour
{
    Rigidbody rb;    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }    void FixedUpdate()
    {
        rb.AddForce(Vector3.up);
    }
}

Example 2: unity drawline

public Transform target;

    void OnDrawGizmosSelected()
    {
        if (target != null)
        {
            // Draws a blue line from this transform to the target
            Gizmos.color = Color.blue;
            Gizmos.DrawLine(transform.position, target.position);
        }
    }