How to swing an Object by linear interpolation?

Question

i trying to swing an object by using Linear interpolation.

Answer 1

Use RotateAround function of transform:

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Update() {
        transform.RotateAround(transform.position, Vector3.up, alpha);
    }
}

where alpha is the angle you wish to rotate, and you need update this to make smooth rotations.