What are the differences between a function and a procedure?

What are the differences between a function and a procedure?

Function is used to calculate something from a given input. Hence it got its name from Mathematics. While procedure is the set of commands, which are executed in a order.

What is difference between function and procedure explain with example?

A function is used to calculate result using given inputs. A procedure is used to perform certain task in order. A function returns a value and control to calling function or code. A procedure returns the control but not any value to calling function or code.

When should you use a function?

A function is almost like a mini-program that we can write separately from the main program, without having to think about the rest of the program while we write it. This allows us to reduce a complicated program into smaller, more manageable chunks, which reduces the overall complexity of our program.

When you should use a function over a procedure?

Procedure allows SELECT as well as DML(INSERT/UPDATE/DELETE) statement in it whereas Function allows only SELECT statement in it. Procedures can’t be utilized in a SELECT statement whereas Function can be embedded in a SELECT statement.

How do you write a procedure?

Here are some good rules to follow:

1. Write actions out in the order in which they happen.
2. Avoid too many words.
3. Use the active voice.
4. Use lists and bullets.
5. Don’t be too brief, or you may give up clarity.
6. Explain your assumptions, and make sure your assumptions are valid.
7. Use jargon and slang carefully.

When using a function what is the first thing you must do?

To create a function, we must first declare it and give it a name, the same way we’d create any variable, and then we follow it by a function definition: var sayHello = function() { }; We could put any code inside that function – one statement, multiple statements – depends on what we want to do.