while

Synopsis

     while boolean_expression do
       statement

Description

The while statement declares a loop. For further description see while Statement.

Conforming to

while is defined in ISO 7185 Pascal and supported by all known Pascal variants.

Example

     program WhileDemo;
     var
       Foo, Bar: Integer;
     begin
       WriteLn ('Enter an descending series of integer numbers.');
       WriteLn ('Terminate by breaking this rule.');
       WriteLn ('Enter start number: ');
       Bar := MaxInt;
       ReadLn (Foo);
       while Foo < Bar do
         begin
           Bar := Foo;
           ReadLn (Foo)
         end;
       WriteLn ('The last number of your series was: ', Bar)
     end.

See also

Keywords, repeat Statement, for Statement.