What's the differences between stored procedures, functions and routines?

Question

In MySQL database context, what is the difference among these 3 terms:

• stored procedure
• stored function
• stored routine<

Answer 1

Function must return a value but in Stored Procedure it is optional( Procedure can return zero or n values). Functions can have only input parameters for it whereas Procedures can have input/output parameters . Functions can be called from Procedure whereas Procedures cannot be called from Function.