how to make a smooth rotation of the object?

I use this script here to rotate the object to the desired degree, how to make the object rotate smoothly?

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class mehanic : MonoBehaviour
6. {
7.    
8.     void FixedUpdate()
9.     {
10.  
11.         if (Input.GetKey(KeyCode.E))
12.         {
13.            
14.             transform.rotation = Quaternion.Euler(new Vector3(0, 0, -90));
15.  
16.         }
17.     }
18. }
19.  

 

You could use Quaternion.RotateTwoards
https://docs.unity3d.com/ScriptReference/Quaternion.RotateTowards.html

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. public class mehanic : MonoBehaviour
5. {
6.  
7.     void FixedUpdate()
8.     {
9.         if (Input.GetKey(KeyCode.E))
10.         {
11.          
12.             transform.rotation = Quaternion.RotateTowards(transform.rotation, Quaternion.Euler(new Vector3(0, 0, -90), 90f * Time.deltaTime);
13.         }
14.     }
15. }
16.  

 

thanks

 

You should the new code here because that one i think is for older versions of unity:

Code (CSharp):

1. transform.rotation = Quaternion.RotateTowards(transform.rotation, Quaternion.Euler(0, 0, -20), 90f * Time.deltaTime);