IndexOutOfRangeException: Array index is out of range Help plz

THE PROBLEM IS IN STATUS GUI TEXT LINE :

var actions :String[];

var indexAction :int;

var statusGUI :GUIText;

var t :float = 0;

var speed :float = 12;

var robotController :CharacterController;

private var jumpSpeed :float = 10.0;

private var flagIdle :boolean = false;

private var moveDirection :Vector3 = Vector3.zero;

private var boostIncr = 1;

private var canAnimate :boolean;

private var gravity = 40;

private var nextLoad :float = 0;

private var rate :float = 5;

private var run : boolean = false;



function Start ()

{	
	indexAction = 0;
    
	statusGUI.text = actions[indexAction];
    
	robotController = GetComponent(CharacterController);
    
	animation.wrapMode = WrapMode.Loop;
	
	animation["idleTap"].wrapMode = WrapMode.Once;
	
}

Plz help me solve this issue.

Have you assigned anything to the actions array, say, in the Inspector?

yes . i assigned number 4 to it.