Solved

Function VS Procedure

Posted on 2004-04-08
9
147 Views
Last Modified: 2010-04-05
I'm confused between Function and Procedure. What are their difference?
0
Comment
Question by:cybermilky
  • 3
  • 3
  • 3
9 Comments
 
LVL 26

Accepted Solution

by:
Russell Libby earned 20 total points
ID: 10789134
A function returns a result value, a procedure does not

Regards,
Russell
0
 
LVL 11

Expert Comment

by:shaneholmes
ID: 10789147

//As Russell stated, a function returns a result

function AbbreviateName(First, Last: String): String;
begin
  result:= First[1] + Last[1];
end;



var
 Abr: String;

 Abr:= AbbreviateName('SHane', 'Holmes');

Abr  = 'SH'



// and A Procedure does not return a result

procedure AbbreviateName(const First, Last: String): String;
var
begin
  ShowMesage(First[1] + Last[1]);
end;




Shane
0
 
LVL 26

Expert Comment

by:Russell Libby
ID: 10789253

procedure AbbreviateName(const First, Last: String): String; <-- ????
var
begin
  ShowMesage(First[1] + Last[1]);
end;

Better dbl-check your procedure again....

Russell


0
 
LVL 11

Expert Comment

by:shaneholmes
ID: 10789255
OOPS!

<SMILE>

Shane
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 1

Author Comment

by:cybermilky
ID: 10789284
function AbbreviateName(First, Last: String): String;
 - means this function returns the result value in String?

While the procedure will not return values, so end of the first line of procedure will not have the return type.

Am I correct?
0
 
LVL 1

Author Comment

by:cybermilky
ID: 10789285
function AbbreviateName(First, Last: String): String;
 - means this function returns the result value in String?

While the procedure will not return values, so end of the first line of procedure will not have the return type.

Am I correct?
0
 
LVL 1

Author Comment

by:cybermilky
ID: 10789288
function AbbreviateName(First, Last: String): String;
 - means this function returns the result value in String?

While the procedure will not return values, so end of the first line of procedure will not have the return type.

Am I correct?
0
 
LVL 26

Expert Comment

by:Russell Libby
ID: 10789309
Like I said, functions return results, so for example:

function AbbreviateName(First, Last: String): String;

returns a string, and can be used like so:

var
 s: String;
begin
  s:=AbbreviateName('Foo', 'Bar');
  ShowMessage(s);
end;

And procedures are functions that do not return any results.

procedure AbbreviateName(First, Last: String);
begin
 ShowMessage(First+','+Last);
 // No result returned
end;

used like:

begin
  AbbreviateName('Foo', 'Bar');
end;

------------------

Regards,
Russell
0
 
LVL 11

Expert Comment

by:shaneholmes
ID: 10790667
cybermilky,

 I believe Russell had already pinpointed by mistake. I had blocked and copied my function, pasted, and reedited it for the procedure, and didn't remove the string from the end, hense the OOPS post thereafter.

Shane

0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
This Micro Tutorial demonstrates using Microsoft Excel pivot tables, how to reverse engineer competitors' marketing strategies through backlinks.
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

912 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now