Volume of box using function

DECLARE FUNCTION VOL(L,B,H)
CLS
INPUT"ENTER LENGTH";L
INPUT"ENTER BREADTH";B
INPUT"ENTER HEIGHT";H
PRINT"VOLUME OF BOX";VOL(L,B,H)
END

FUNCTION VOL(L,B,H)
VOL=L*B*H
VOL=V
END FUNCTION