Unity3d Tutorial: Application Class Part4 - unityVersion

http://file:///Applications/Unity/Documentation/ScriptReference/Application-unityVersion.html

Application.unityVersion

static var unityVersion : String

Description

The version of the Unity runtime used to play the content.

C#

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void Awake() {
print("Version of the runtime: " + Application.unityVersion);
}
}