main.js
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// create your Animal class here
function Animal(name, numLegs){
    this.name = name;
    this.numLegs = numLegs;
}

// create the sayName method for Animal
Animal.prototype.sayName = function(){
    console.log("Hi my name is" + " " + this.name);
};

// provided code to test above constructor and method
var penguin = new Animal("Captain Cook", 2);
penguin.sayName();
Native Browser JavaScript