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   ► KBProgrammingDelphi for W...Language Basics   Print This     
  From the October 2009 Issue of Prestwood eMag
 
Delphi Language Basics:
Delphi If Statement (If..Else If..Else)
 
Posted 13 years ago on 10/23/2008 and updated 1/17/2009
Delphi Code Snippet:
 A flashcard from our Delphi Flashcards Library
 A code snippet from our Delphi Code Snippets Page

KB101385

Delphi If Statement

Notice in the more complete example that the semicolon for the begin..end block after end is not included. That tells the compiler something else is coming (the statement is not finished). Also note the semicolon is missing right before the final "else" statement.

Note: The following example uses floating point literals. In Delphi, to specify a fractional floating point literal between 1 and -1, you preceed the decimal with a 0; otherwise, you will get a compiler error (i.e. .1 + .1 does not work).

Syntax Example:
if (0.1 + 0.1 + 0.1) = 0.3 then
  ShowMessage('Correct')
else
  ShowMessage('Not correct');
 
//Complete example:
if x = true then
begin
  ShowMessage('x is true');
end
Else If y = 'Mike' Then 
  ShowMessage('hello mike')
Else 
  ShowMessage('last option');

Here are some more simpler examples:

//Simple 1-line example:
IfX = True Then
	'>>>do something.
 
//Simple with block of code:
IfX = True Then
begin
	'>>>do something 1.
	'>>>do something 2.
end;

More Info


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Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

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