03. Animal Type

function animalType(animal) {

    if (animal == "dog")
        console.log("mammal");
    else if (animal == "crocodile" || animal == "tortoise" || animal == "snake")
        console.log("reptile");
    else
        console.log("unknown");
}

Второ решение(switch):

function animalType(input) {
    let animal = input[0];

    switch (animal) {
        case "dog":
            console.log("mammal");
            break;
        case "crocodile":
        case "tortoise":
        case "snake":
            console.log("reptile");
            break;
        default:
            console.log("unknown");
            break;
    }
}