Boolean

A true/false value.

Declaration

Choose the type in a Variable/parameter/field type picker. Use the nullable flag only when absence is part of the intended model.

Example

true

Use Boolean-returning methods in If or compatible equality/state conditions. Boolean is not automatically the Number 0/1.

Compatibility

Required inputs must be assigned and type-compatible. Nullable values require compatible nullable inputs or coalescing. Collection declarations remain invariant; native Targets and custom classes follow their supported inheritance rules. Final controls a binding, not deep immutability.

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