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False

False = 0

Example​

procedure ScriptEvent(var Value: variant);
var
  IsReady: Boolean;
begin
  IsReady := False;

  if not IsReady then
    Value := 'Not ready';
end;

Usage​

Represents the Boolean false condition and the zero-valued member of Velox scripting's Boolean type.

Conditions and short-circuiting

An if, while or Boolean expression treats False as the unsatisfied branch. Velox uses short-circuit Boolean evaluation. For Boolean operands:

  • False and RightExpression does not need to evaluate RightExpression;
  • False or RightExpression must evaluate RightExpression to determine the result; and
  • not False evaluates to True.

Do not put required side effects in the right-hand side of an and expression, because they will not run when the left side is False.

Additional Technical Info​

False is the negative member of PascalScript's Boolean type. Use it for a logical condition that is not satisfied, a disabled switch or the initial state of a Boolean flag.

The example assigns a genuine Boolean value, so the not expression evaluates to True and sets Value to Not ready. It is source-reviewed and is not executed by the documentation workflow.

Type and value

Velox's modified PascalScript compiler creates the type as Boolean = (False, True). False is therefore an enum member with ordinal zero, not a Velox-imported mutable variable and not merely an untyped numeric macro.

The compiler can use the ordinal representation internally, and converting a Boolean to an ordinal context produces zero for False. Keep the logical type in normal script code; its storage representation is not a good substitute for a documented integer or database flag contract.

Conversion boundaries

  • False and the Velox comparison constant Same both have a numeric representation of zero, but they express different domains. Use Same when testing the result of CompareValue; use False for a Boolean condition.
  • A Variant can hold a Boolean, integer, string, Null or Empty. Test dynamic values and convert them deliberately rather than assuming every zero-like value is a Boolean False.
  • Database and configuration flags may use 0/1, Y/N or other conventions. Validate that external contract before assigning a Boolean.

Side effects

None. False is a compile-time language value.

Errors

Referencing False itself does not raise. Conversion of an incompatible dynamic or textual value to Boolean can fail before the assignment or condition is evaluated.

Performance and concurrency

Reading the value requires no allocation, I/O or shared mutable state. Short-circuiting can avoid evaluation of the right operand.

Related entries

  • True is the other Boolean member.
  • Boolean defines the logical type.
  • Same is the numeric zero result of Velox comparison functions; it is not a Boolean alias.
  • Boolean operators explains logical expressions.

External references

Created 2026-07-15