Extra credit for Introduction to Programming

In the functions section of the Introduction to Programming deep dive, we're given the following assignment:

"Create a function that takes 3 arguments, a, b, and c. If a is an even number have the function return the string "even". Otherwise have the function return the string "odd""

For the life of me, I'm not having any luck getting this to work. I think my code is right within the function, but I can't figure out how to access the argument a.

The code I've written so far:

var evenCheck = function (a; b; c) {

if a % 2 == 0 {
    return "even";
}
else {
    return "odd";
}

}

Please help! I feel like I shouldn't be having so much trouble with this, and I'm feeling kind of dumb! I didn't have any trouble with Fizzbuzz earlier.