Question

Differentiate user defined and system defined Functions.

Answer 1

User-defined Functions.	System define Functions
User-Defined Functions are the functions which are created by user as per his own requirements.	System define Functions are Predefined functions.
In User Defined Functions, name of function can be changed any time	In System Defined Functions, Name of function can’t be changed
In User Defined Functions, the name of function id de­cided by user	In System Defined Functions, it is giv­en by developers.