Selection: CASE Statement Damian Gordon. Selection As well as the IF Statement, another form of SELECTION is the CASE statement.

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Presentation transcript:

Selection: CASE Statement Damian Gordon

Selection As well as the IF Statement, another form of SELECTION is the CASE statement.

CASE Statement If we had a multi-choice question:

CASE Statement If we had a multi-choice question:

CASE Statement Read Answer; IF (Answer = ‘A’) THEN Print “That is incorrect”; ELSE IF (Answer = ‘B’) THEN Print “That is incorrect”; ELSE IF (Answer = ‘C’) THEN Print “That is Correct”; ELSE IF (Answer = ‘D’) THEN Print “That is incorrect”; ELSE Print “Bad Option”; END IF;

CASE Statement PROGRAM MultiChoiceQuestion: Read Answer; IF (Answer = ‘A’) THEN Print “That is incorrect”; ELSE IF (Answer = ‘B’) THEN Print “That is incorrect”; ELSE IF (Answer = ‘C’) THEN Print “That is Correct”; ELSE IF (Answer = ‘D’) THEN Print “That is incorrect”; ELSE Print “Bad Option”; ENDIF; END.

CASE Statement Read Answer; CASE OF Answer ‘A’ :Print “That is incorrect”; ‘B’ :Print “That is incorrect”; ‘C’ :Print “That is Correct”; ‘D’ :Print “That is incorrect”; OTHER:Print “Bad Option”; ENDCASE;

CASE Statement PROGRAM MultiChoiceQuestion: Read Answer; CASE OF Answer ‘A’ :Print “That is incorrect”; ‘B’ :Print “That is incorrect”; ‘C’ :Print “That is Correct”; ‘D’ :Print “That is incorrect”; OTHER:Print “Bad Option”; ENDCASE; END.

CASE Statement Or, in general: CASE OF Value Option1: ; Option2: ; Option3: ; Option4: ; OTHER : ; ENDCASE;

START END Option1 No Read in A Yes Print “Option 1” Option2 No Yes Print “Option 2” OTHER No Yes Print “OTHER”

CASE Statement Read Result; CASE OF Result Result => 70 :Print “You got a first”; Result => 60 :Print “You got a 2.1”; Result => 50 :Print “You got a 2.2”; Result => 40 :Print “You got a 3”; OTHER :Print “Dude, you failed”; ENDCASE;

CASE Statement PROGRAM GetGrade: Read Result; CASE OF Result Result => 70 :Print “You got a first”; Result => 60 :Print “You got a 2.1”; Result => 50 :Print “You got a 2.2”; Result => 40 :Print “You got a 3”; OTHER :Print “Dude, you failed”; ENDCASE; END.

etc.