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   ► KBTo/From GuidesDelphi PrismStatements  Print This     

Cross Ref > Statements

By Mike Prestwood

Delphi Prism versus PHP: A side by side comparison between Delphi Prism and PHP.

 
Statements
 

Common statements such as if statements, loops, etc.

Exception Trapping

[Other Languages] 

Languages Focus

A common usage of exception handling is to obtain and use resources in a "try-it" block, deal with any exceptions in an "exceptions" block, and release the resources in some kind of "final" block which executes whether or not any exceptions are trapped.

Delphi Prism:   try..except, try..finally

Use a try..except..end block to trap and process errors.

Delphi also offers a try...finally where code will execute in the finally section no matter what. It's common to put a try..except inside a try..finally.

Syntax Example:
try
  var y: Integer;
  y := 0;
  y := 1/y;
except
  MessageBox.Show("You cannot divide by zero.");
end;
[Not specified yet. Coming...]




If Statement

[Other Languages] 
Delphi Prism:   if..else if..else

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.

Syntax Example:
//Complete example:
if x = true then begin
  ShowMessage('x is true');
end
Else If y = 'Mike' Then 
  ShowMessage('hello mike')
Else 
  ShowMessage('last option');
PHP:   if..elseif..else

The PHP if statement consists of using if, elseif, and else.

Syntax Example:
$x = 8;
  
if ($x == 10) {
 echo "x is 10."; 
} elseif ($x < 10) {
 echo "x is less than 10.";
} else {
 echo "x must be greater than 10."; 
};




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