If and Then

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Revision as of 22:58, 26 October 2010 by Rfc1394 (talk | contribs)

This keyword precedes a condition, is required to be followed by then and may optionally be followed by else.

If then

<delphi>

 if condition
   then true_statement
   else false_statement;

</delphi>

Condition is a Boolean expression that evaluates to true or false. true_statement is executed if condition evaluates to true. false_statement is executed if condition evaluates to false. An error occurs if condition does not evaluate to a boolean value.


More statements in "if then" statement

If you need two or more statements for true_statement or false_statement, place them within a begin ... end Block.

<delphi>

 if boolean_condition then
   begin
     statement_one;
     statement_two;
     statement_three;
   end;

</delphi>



Keywords: begindoelseendforifrepeatthenuntilwhile