Overloading and Overiding are pratical implementation of OOPs Concept.

Overloading:

In Simple words, Same function name but different signature(Parameters)

For Example:

To Add 2 integers Add(int i, int j)

To add two string Add(string i, string j)

Depending on the signature(parameters) of the calling function, respective function would be called. if you pass 2 string parameter second function would be called and if you pass two integer parameter first function would be called.

Overriding(Polyphormism):

Same Function Name, same signature, different functionality.

Example for overriding

Class Shapes { Virtual void Paint() }

Class Circle:Shapes { Override void Paint() }

Class Square:Shapes { Override void Paint() }

Here in the above code we can see that the shapes is class which has a method Paint, which would paint according to the shape of the object each object would implement the paint method differently based on its dimensions.