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DelphiAssert

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assert

assert is a statement used for debugging. It is inherently implemented in Delphi (see the C++ assert that works the same for more details). The two pieces of code below show the use of assert. The first piece of code assumes something obviously false (i.e. that 2 equals 3), the second does the same without giving an error:

program Project1
{$APPTYPE CONSOLE}
{$ASSERTIONS ON}
uses
  sysUtils;
begin
  assert(2=3)
end.

The next program is in 'developmental stage':

program Project1
{$APPTYPE CONSOLE}
{$ASSERTIONS OFF}
uses
  sysUtils;
begin
  assert(2=3)
end.

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