Abstract Method

A method signature without a method body that must be overridden.

What is an Abstract Method?

An abstract method is a method signature without a method body. Abstract methods CAN ONLY exist in an abstract class. Any child class must implement the logic for all abstract methods.

public abstract class Building {
    public abstract void Open();
}

public class Hotel : Building {
    public override void Open() {
        // logic to open a hotel
    }
}

Level: Journeyman · More OOP terms at this level

Updated October 12, 2026