JS help

Question

Entrance to the club is only permitted in pairs.
Take the number of customers in the club as input, and, if all of them have a pair, output to the console "Right", otherwise output "Wrong".

Sample Input
14

Sample Output
Right

function main() {
var numberGuests = parseInt(readLine(), 10)
// Your code here
if (numberGuests == ) {
console.log("Right");
}
else {
console.log("Wrong");

}
}
Think I'm missing something. They haven't taught how to determine if a number is even or odd.

Answer 1

% -> this operator returns the remainder.
If numberGuests % 2 == 0, Right.

Answer 2

Thanks! Makes sense now. Wouldn't have thought of using it that way