The formal term is attention-deficit hyperactivity disorder. But I understand that, sometimes, people say, "Do I have ADD, or ADHD without the hyperactive part?" So I just like to inform my parents that the disorder is attention-deficit hyperactivity disorder. However, the way it's broken down into subtypes helps better delineate the types of symptoms you have.
For instance, a child that has ADHD can have primarily inattentive subtypes, meaning that more prevalent or pronounced is your child's drifting attention, or making careless errors and missing the fine details. Then there's the primarily impulsive hyperactive subtype, and this is the child that often interrupts, has trouble waiting their turn, and is a child that seems like he's moving by a motor and busy, busy, busy, up and down and all over the place all of the time. Then there's the combined subtype, because some children are both inattentive and impulsive and hyperactive, and all of the symptoms are present and prevalent for this combined subtype.
So keep in mind that there is no such thing as ADD. But it's ADHD with the different subtypes.