01. Ages

function ages(age) {

    if(age > 65){
        console.log('elder');
    }
    else if(age > 19){
        console.log('adult');
    }
    else if(age > 13){
        console.log('teenager');
    }
    else if(age > 2){
        console.log('child');
    }
    else if(age >= 0){
        console.log('baby');
    }
    else{
        console.log('out of bounds');
    }

}


Решение с тернарен оператор:

function ages(age) {

let personStatus =
    age > 65? 'elder':
        age > 19? 'adult':
            age > 13? 'teenager':
                age > 2? 'child':
                    age >= 0? 'baby' : 'out of bounds';

    console.log(personStatus);

}