const robot = { _model: '1E78V2', _energyLevel: 100, get energyLevel(){ if(typeof this._energyLevel === 'number') { return 'My current energy level is ' + this._energyLevel } else { return "System malfunction: cannot retrieve energy level" } } }; console.log(robot.energyLevel); const person = { _firstName: 'John', _lastName: 'Doe', get fullName() { if (this._firstName && this._lastName){ return `${this._firstName} ${this._lastName}`; } else { return 'Missing a first name or a last name.'; } } } // To call the getter method: person.fullName; // 'John Doe'