タイプ 3 1 DO reference = 2+ , 2 %specification 仕様: 1 exp1 2? 2 TO exp2 2.1? BY exp3 2 BY exp3 2.1? TO exp2 2 REPEAT exp6 3? 3 WHILE ( exp4 ) 3.1? UNTIL ( exp5 ) 3 UNTIL ( exp5 ) 3.1? WHILE ( exp4 )