#callbyvalue #callbyreference
Call by Value means calling a method with a parameter as value. Through this, the argument value is passed to the parameter.
While Call by Reference means calling a method with a parameter as a reference. Through this, the argument reference is passed to the parameter.
In call by value, the modification done to the parameter passed does not reflect in the caller's scope while in the call by reference, the modification done to the parameter passed are persistent and changes are reflected in the caller's scope.
In this video, both these parts are explained separately.