[Somebody Help!] Scripting error - Pong Game (Player Controller)

Unity Engine
1

Hello, im newbie programming and scripting, please can somebody help me?

when i build the script, sends me an error message who says: "Expressions in statements must only be executed for their side-effects’’ but i dont see it, can anybody tells me what im doing wrong?

#pragma strict

var moveUp : KeyCode;
var moveDown : KeyCode;

var speed : float = 10;

function Update ()
{
if(Input.GetKey(moveUp))
{
rigidbody2D.velocity.y - speed; // ← There is the problem, but where?

}
else if(Input.GetKey(moveDown))
{
rigidbody2D.velocity.y = speed *-1;
}
else
{
rigidbody2D.velocity.y = 0;
}
}

Anyway Thanks for the support!

2

You need an equals sign there like in the rest of your code.