2. How to make a 2D Game - Unity 4.3 Tutorial

#pragma strict

var moveUp : KeyCode;
var moveDown : KeyCode;

var speed : float = 10;

//
function Update ()
{
var check   =0 ;
    if( Input.GetKey(moveUp) ){
        check=1;
/*      GetComponent.<rigidbody2D>().velocity.y = speed;*/
        GetComponent.<Rigidbody2D>().velocity.y = speed;
    }

    if( Input.GetKey(moveDown)){
        check=1;
//      GetComponent.<rigidbody2D>().velocity.y = speed * -1;
        GetComponent.<Rigidbody2D>().velocity.y = speed * -1;
    }

    if(check==0){ //else
//      GetComponent.<rigidbody2D>().velocity.y =0;
        GetComponent.<Rigidbody2D>().velocity.y = 0;
    }
}