PL/SQL Functions

PL/SQL Functions
What is a Function in PL/SQL?
A function is a named PL/SQL Block which is similar to a procedure. The major difference between a procedure and a function is, a function must always return a value, but a procedure may or may not return a value.
The General Syntax to create a function is:
CREATE [OR REPLACE] FUNCTION function_name [parameters]
RETURN return_datatype; 
IS 
Declaration_section 
BEGIN 
Execution_section
Return return_variable; 
EXCEPTION 
exception section 
Return return_variable; 

END; 
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