QBasic Programming

Display area of square

REM PROGRAM TO DISPLAY AREA OF SQUARE
CLS
INPUT “ENTER LENGTH”; L
A = L ^ 2
PRINT “AREA OF SQUARE ”; A
END

USING SUB PROCEDURE

DECLARE SUB AREA (L)
CLS
INPUT “ENTER LENGTH”; L
CALL AREA(L)
END

SUB AREA (L)
A = L ^ 2
PRINT “AREA OF SQUARE”; A
END SUB

USING FUNCTION PROCEDURE

DECLARE FUNCTION AREA (L)
CLS
INPUT “ENTER LENGTH”; L
AR = AREA(L)
PRINT “AREA OF SQUARE ”; AR
END

FUNCTION AREA (L)
A = L ^ 2
AREA = A
END FUNCTION

Display area of rectangle (Prev Lesson)
(Next Lesson) Display area of circle
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