So I'm working on a game that will accept user input (up down left right arrow keys). To do so, I will add an event listener that will check when the user presses said keys. I have it set up in the following way:

```
function gameStart(){

    //Generates four random numbers on board
    for(gameStart_i = 0; gameStart_i < 4; gameStart_i++){
        generateNumber();
    }

    document.getElementById("start_button").innerHTML = "Reset Game";
    document.getElementById("start_button").setAttribute('onclick', 'reset()');
    document.getElementById("start_button").id = 'reset_button';

    var board = document.getElementById("game_background");

    console.log("1");
    board.addEventListener("keydown", inputListen(), false);
    console.log("1.1");
}

function inputListen(e){
    console.log("2");
    var code = e.keyCode;
    switch(code){
        case 37:
            alert("left");
            break;
        case 38:
            alert("up");
            break;
        case 39:
            alert("right");
            break;
        case 40:
            alert("down");
            break;
    }
}

```

This seems in line with how tutorials show it. However, some tutorials change the addEventListener line with something that would look like this:

```
  board.addEventListener("keydown", inputListen, false); //removes the () after the function

```

However that doesn't seem to work for me when I look into my console.

When I run my code my console gives me the following error:

```
  1
  2
Uncaught TypeError: Cannot read property 'keyCode' of undefined
    at inputListen (script.js:86)
    at gameStart (script.js:16)
    at HTMLButtonElement.onclick (2048Game.html:114)

```

I think it's because I don't pass any parameters to my function, but none of the online tutorials pass paraements in their addEventListener statement.

Thank you,
Alex