What is difference between abstract class and inheritance?

Question

When I was learning abstract class and inheritance i haven't found much difference, the purpose of both seems same, so why there is these 2 different concepts.

Edit:
There was differences prior to launching of Java 1.8
Where in interface we could have only abstract methods but now interface can have both default methods and abstract methods.

Answer 1

Inheritance: We need to override the method in child class
We use Inheritance in case of Parent-Child relationship[Child can have all functionalities which Parent have and can add more functionality to itself too]

And we use Abstract class(In java) for a partial set of default implementations of methods in a class, which also can be implemented by simple Inheritance.

Abstract class: Put abstract keyword in method name and need to implement the method in child class