montyhall.js

function playMontyHall(toSwitch) {

    let carIsIn = Math.floor(Math.random() * 3);

    let doorSelected = Math.floor(Math.random() * 3);

    let revealedDoor = [0,1,2].find((door) => door !== carIsIn && door !== doorSelected);

    if(toSwitch){
        return carIsIn === [0,1,2].find((door) => door !== doorSelected && door !== revealedDoor)
    }
    else {
        return carIsIn === doorSelected
    }

}