Prestwood IT: If Statement (Cross Reference Coding Encyclopedia: ASP Classic)

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► KB ► To/From Guides ► ASP Classic

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If Statement

ASP Classic: If..ElseIf..Else..End If

The End If is optional if you put your code on a single line.

Syntax Example:

//Single line example.

If X = True Then Response.Write "hello"

//Complete example.

If X = True Then
  '>>>do something.

ElseIf Y = "ABC" Then
  '>>>do something.
Else
  '>>>do something.

End If

ASP Classic If Statement (If..ElseIf..Else..End If)

Cross Reference Examples:

Access VBA: If..ElseIf..Else..End If

The End If is optional if you put your code on a single line.

Syntax Example:

//Single line example.

If X = True Then MsgBox "hello"

//Complete example.

If X = True Then
  '>>>do something.

ElseIf Y = "ABC" Then
  '>>>do something.
Else
  '>>>do something.

End If

C#: if..else if..else

Use () around evaluation with no "then".

Syntax Example:

Boolean x = true;



if (x)
{
  MessageBox.Show("hello");
}
else if (x==false)
{
  MessageBox.Show("goodbye");
}

else

  MessageBox.Show("what?");
}

C++: if..else if..else

Same as standard C.

Syntax Example:

//C++Builder example using the VCL ShowMessage.

int x;

x = 8;

if (x == 10) {
  ShowMessage("x is 10.");
} else if (x < 10) {
  ShowMessage("x is less than 10.");
} else {
  ShowMessage("x must be greater than 10.");
}

C++/CLI: if..else if..else

Same as standard C.

Syntax Example:

int x;

x = 8;

if (x == 10) {
  MessageBox::Show("x is 10");
} else if (x < 10) {
  MessageBox::Show("x is less than 10"); 
} else {
  MessageBox::Show("x must be greater than 10"); 
}

Corel Paradox: If..Else..EndIf, or switch

ObjectPAL supports a simple If...Else...EndIf statement.

Notice ObjectPAL does not support an ElseIf feature as part of an if statement. Instead use a switch statement

Syntax Example: 1 certification question.

'Does ObjectPAL evaluate the math correctly? No!

If (.1 + .1 + .1) = .3 Then
  msgInfo("", "Correct")
Else
  msgInfo("", "Not correct")
EndIf

'Switch statement example.
switch
  case x = "Nate": MsgInfo("", "Hi Nate")
  case x = "Felicia": MsgInfo("", "Hi Felly")

  otherwise: MsgInfo("", "Who are you?")

endSwitch

Delphi: 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.

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');

Delphi If Statement (If..Else If..Else)

Delphi Prism: if..else if..else

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');

Java: if..else if..else

Syntax template:

if (expression) {

  expression1_true_code;

} else if (expression2) {

  expression2_true_code;

} else {

  otherwise_code;

Syntax Example:

if ((.1 + .1 + .1) == 0.3) {
  System.out.println("Correct");
} else {
  System.out.println("Not correct");
}

JavaScript: if..else if..else

Same as C/C++ but, as usual, the semicolons are optional.

Syntax Example:

var x = 8;

if (x == 10) {
 document.write("x is 10.");
} else if (x < 10) {
 document.write("x is less than 10.");  
} else {
 document.write("x must be greater than 10."); 
}

Perl: if..elsif..else

Notice Perl is different from most other languages in it's spelling of elsif (else is not spelled correctly).

Syntax Example:

$x = 8;

if ($x == 10) {
 print "X is 10.";
} elsif ($x < 10) {
 print "X is less than 10.";
} else {
 print "X must be greater than 10.";
}

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.";  
};

VB Classic: If..ElseIf..Else..End If

The End If is optional if you put your code on a single line.

Syntax Example:

//Single line example.

If X = True Then MsgBox "hello"

//Complete example.

If X = True Then
  MsgBox "hello"

ElseIf Y = "ABC" Then
  MsgBox "goodbye"
Else
  MsgBox "what?"
End If

VB.Net: If..ElseIf..Else..End If

Same as VB classic.

Syntax Example: 1 certification question.

If x Then
  MessageBox.Show("hello")
ElseIf Not x Then
  MessageBox.Show("goodbye")
Else
  MessageBox.Show("what?")
End If