How to Calculate rigidbody2D velocity and display it on a label?

Questions & Answers
1

How to Calculate rigidbody2D velocity and display it on a label?
I have the following script on my Game object I want to Show its Velocity and a rigidbody2d attached to it
that what I got so far

#pragma strict

 var speed : float; 

function Update () {
speed = rigidbody2D.velocity.magnitude;
}
function OnGUI () {
		GUI.Label (Rect (10, 10, 100, 20), speed);
	}

But I got this error:
Assets/SpeedView.js(9,27): BCE0023: No appropriate version of ‘UnityEngine.GUI.Label’ for the argument list ‘(UnityEngine.Rect, float)’ was found.

2

Try:

   GUI.Label (Rect (10, 10, 100, 20), speed.ToString());