script error GUI super simple code

Questions & Answers
1 
var score = 0;

guiText.text = "Score: "+score;

function OnCollisionEnter(hit : Collider) {
if(hit.gameObject.name == "bug enemy pre(Clone)"){
{
    score += 5;
}
}
}

It's pretty straight forward, but basically on collision with the enemy object, I want the score to move up by 5. I'm getting an error that says "Assets/score.js(9,11): BCE0044: expecting :, found '+='." I'm sure this is a super simple error, and I have tried changing some things around, but this seems like the smoothest solution, so a little help would be very much appreciated. oooooo, and anyone who gives an answer (that solves my problem) can call me an idiot! And its JS...

2

"score ++ 5" isn't valid syntax. "score += 5"

3

Is this helping ?:

var score = 0;

guiText.text = "Score: "+score;

function OnCollisionEnter(hit : Collision)
{
    if(hit.gameObject.name == "bug enemy pre(Clone)")
    {
     score += 5;
    }
}

Not sure if this is fixing it,but you had brackets to many.

4

Ok using both of your advice i fixed it to an un-bugged version! thanks... i'm not sure who to mark correct, because you both were right... anyway here is the working code

var score = 0;

guiText.text = "Score: "+score;

function OnCollisionEnter(hit : Collision){
if(hit.gameObject.name == "bug enemy pre(Clone)"){
         score += 5;
}
}

whether this code works or not is for another day, anyway thanks all