Rotate object through c# script

I was wondering how I might go about rotating an object when my play presses a button. I would like to have it so when my player presses the space button, it rotates and object 90°. I can't figure out how to do so. Thanks.

 

There are several ways to do this. For example http://unity3d.com/learn/tutorials/modules/beginner/scripting/translate-and-rotate?playlist=17117 and http://unity3d.com/learn/tutorials/modules/beginner/scripting/look-at?playlist=17117

 

Code (CSharp):

1. if (Input.GetKeyDown("Jump")) {
2.    transform.Translate(0,90,0); //this will rotate it on the y axis, change it if needed
3. }

 

Ehm, Translate??

 

sorry.Rotate