CSHARP

Rotating an object in Unity

using UnityEngine;

public class Rotation_demo : MonoBehaviour
{
    Vector3 rot=new Vector3(10,10,10);
  
    void Start()
    {
       transform.Rotate(rot);
        
    }
}

rotate gameobject unity

Transform.Rotate(Vector3 eulers)
// you can add relativeTo=Space.Self for it to rotate arround itself or do
// relativeTo=Space.World to rotate relative to the scene
// https://docs.unity3d.com/ScriptReference/Transform.Rotate.html

Rotating an object in Unity usign Physics

using UnityEngine;

public class rotation_example : MonoBehaviour
{
    public float torque;
    public Rigidbody rig;

    void Start()
    {
        rig = GetComponent<Rigidbody>();
    }

    void FixedUpdate()
    {
        rig.AddTorque(transform.up * torque);
    }
}