QBASIC PROGRAM TO FIND AREA OF BOX(FUNCTION)

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

FUNCTION AREA (L, B, H)
A= 2 *(L * B+ L * H+B * H)
AREA= A
END FUNCTION