setter&getter

let _age = 4

class Animal {

construct (type){

this.type = type

}

get age(){

return _age

}

set age(val){

if(val < 7 && val >4){

_age = val

}

}

eat(){

console.log('eat food')

}

}

let dog = new Animal('dog')

console.log(dog.age)

dog.age = 6

console.log(dog.age)

console.log(dog._age)