Boo who free freecodecamp.org

[YKalashnikov]

function booWho(bool) {
// the fastet way to solve this problem
return typeof bool==="boolean";
}

booWho(null);

/* another way to solve it

function booWho(bool) {
if (bool===true || bool===false){
return true;

}
else{
return false;
}
return bool;
}

booWho(false);
*/