Smooth 90 degree rotation on keypress

Hi Unity Anwsers,

I’m trying to make a C# script that’ll rotate a GameObject 90 degress og -90 degress on the y-axis over 1 second when I press a button. I’ve searched around, but I can’t find anything that works.

So far, I’ve made a float that holds rotation, and set it to 90f. Then I’ve put a transform.Rotate in my ‘update’ function when I press the keys ‘e’ or ‘q’ However, this turns the object immediately and not over time - can anybody help med add the time to my code?

public float rotation = 90f;

void Update () {
	if (Input.GetKeyDown ("e")) {
		transform.Rotate (0, rotation, 0);
	}
	if (Input.GetKeyDown ("q")) {
		transform.Rotate (0, -(rotation), 0);
	}
}

Thank you so much @Mmmpies.

That did the trick! My final code ended up looking like this:

	IEnumerator RotateMe(Vector3 byAngles, float inTime) 
	{	var fromAngle = transform.rotation;
		var toAngle = Quaternion.Euler(transform.eulerAngles + byAngles);
		for(var t = 0f; t < 1; t += Time.deltaTime/inTime) {
			transform.rotation = Quaternion.Slerp(fromAngle, toAngle, t);
			yield return null;
		}
	}
void Update () {
	if(Input.GetKeyDown("e")){
	StartCoroutine(RotateMe(Vector3.up * 90, 0.8f));
	}
	if(Input.GetKeyDown("q")){
	StartCoroutine(RotateMe(Vector3.up * -90, 0.8f));
	}
  }
}

i know this an old post but it helped me and will help others i altered it a bit to stop you rotating till it had finished or you could get odd angles

bool rotating;
    IEnumerator RotateMe(Vector3 byAngles, float inTime)
    {
        var fromAngle = transform.rotation;
        var toAngle = Quaternion.Euler(transform.eulerAngles + byAngles);
        for (var t = 0f; t <= 1; t += Time.deltaTime / inTime)
        {
            transform.rotation = Quaternion.Slerp(fromAngle, toAngle, t);
          
            yield return null;
        }

        transform.rotation = toAngle;
        rotating = false;
    }
    void Update()
    {

   


            if (Input.GetKeyDown("e") && !rotating)
            {
                rotating = true;
                StartCoroutine(RotateMe(Vector3.up * 90, 0.8f));
            }
            if (Input.GetKeyDown("q") && !rotating)
            {
                rotating = true;
                StartCoroutine(RotateMe(Vector3.up * -90, 0.8f));
            }

   


    }

I noticed as I run this code the object (cube in my case) doesn’t rotate a complete 90 degrees. It falls short on each key press. Any idea why?