CSHARP

how to rotate object in unity only on one axis

// If you want the obj to rotate on only one axis do this

// Create vector3
Vector3 target_position = new Vector3(transform.position.x,
                                                target.position.y,
                                                transform.position.z);
// give the target_position to transform.LookAt

transform.LookAt(target_position);

unity rotate around axis

transform.Rotate(axis, degrees);

Unity Object rotation along any axis

using UnityEngine;
public class Rotation : MonoBehaviour
{
    public float xAngle, yAngle, zAngle;

    public GameObject objectToRotate;

    void Awake()
    {
   //change position here to see object as want
        objectToRotate.transform.position = new Vector3(0.1f, 0.0f, 0.0f);
        objectToRotate.transform.Rotate(90.0f, 0.0f, 0.0f, Space.Self);

    }

    void Update()
    {
        objectToRotate.transform.Rotate(xAngle, yAngle, zAngle, Space.Self);
     
    }
}