See the code around here to answer that question: Definition of 'if' statement: https://github.com/c3d/xl/blob/fast/src/builtins.xl#L155 https://github.com/c3d

See the code around here to answer that question: Definition of 'if' statement: https://github.com/c3d/xl/blob/fast/src/builtins.xl#L155 https://github.com/c3d/xl/blob/fast/src/builtins.xl#L155 // If-then-else statement if [[true]] then True else False is True if [[false]] then True else False is False if [[true]] then True is True if [[false]] then True is false Definition of loops (https://github.com/c3d/xl/blob/fast/src/builtins.xl#L222 https://github.com/c3d/xl/blob/fast/src/builtins.xl#L222) // Loops while Condition loop Body is if Condition then Body while Condition loop Body until Condition loop Body is { while not Condition loop Body } loop Body is { Body; loop Body } for Var in Low..High loop Body is Var := Low while Var < High loop Body Var := Var + 1