randomNumber = Math. floor(Math. random() * 100);
console. log(randomNumber);
switch(true) {
case (randomNumber < 20) :
console. log('randomNumber меньше 20');
break;
case (randomNumber > 50) :
console. log("randomNumber больше 50");
break;
default :
console. log("randomNumber больше 20, и меньше 50");
}