RosettaCodeData/Task/Reverse-a-string/Modula-3/reverse-a-string.mod3

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MODULE Reverse EXPORTS Main;
IMPORT IO, Text;
PROCEDURE String(item: TEXT): TEXT =
VAR result: TEXT := "";
BEGIN
FOR i := Text.Length(item) - 1 TO 0 BY - 1 DO
result := Text.Cat(result, Text.FromChar(Text.GetChar(item, i)));
END;
RETURN result;
END String;
BEGIN
IO.Put(String("Foobarbaz") & "\n");
END Reverse.