CASE OF…ENDCASE (8.1b)

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Quick Questions

Shade in the A or B circle for each question.

1. Which line correctly starts a CASE statement that tests the variable Choice?

A CASE Choice THEN

B CASE OF Choice

2. Which keyword closes a CASE statement?

A ENDCASE

B ENDIF

3. Which is the correct way to write one value and its statement inside a CASE?

A 1 : OUTPUT "Start"

B 1 THEN OUTPUT "Start"

4. How should the values be laid out inside a CASE statement?

A One value per line, each with its own statement

B All the values on one line, separated by commas

5. What does CASE OF Choice do when Choice has the value 2?

A Runs every statement in the CASE one after another

B Runs the statement beside the value 2

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1CASE OF Choice		AStarts a CASE statement that compares the variable Choice with a list of values
2ENDCASE		BCloses the CASE statement after the last value has been listed
3Each value is written with a colon, then the statement that runs when the variable matches that value		CCASE OF Grade 'A' : OUTPUT "Top" 'B' : OUTPUT "Good" ENDCASE
4A CASE statement can test a CHAR variable, with each CHAR value written one per line		D1 : OUTPUT "Start"
5CASE OF Choice 1 : OUTPUT "Start" 2 : OUTPUT "Quit"		EENDCASE is missing, so the CASE statement is never closed. Add ENDCASE after the last value.
6CASE OF Choice 1 OUTPUT "Start" 2 OUTPUT "Quit" ENDCASE		FThe colon is missing between each value and its statement. It should be 1 : OUTPUT "Start".

Definitions

CASE OF Choice

Fill in the Blanks

Complete each line of code by filling in the missing parts.

____ OF Choice 1 : OUTPUT "Start" ENDCASE

CASE OF ______ 1 : OUTPUT "Start" ENDCASE

CASE OF Choice 2 : OUTPUT "Quit" _______

CASE OF Grade 'A' _ OUTPUT "Top mark" ENDCASE

CASE OF Choice 2 : ______ "Quit" ENDCASE

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A CASE Choice

B 1 : OUTPUT "Play"

C 2 : OUTPUT "Quit"

D ENDCASE

Question 2

A INPUT Grade

B CASE OF Grade

C 'A' : OUTPUT "Top"

D 'B' = OUTPUT "Good"

E ENDCASE

Question 3

A CASE OF Day

B 1 : OUTPUT "Mon"

C 2 : OUTPUT "Tue

D 3 : OUTPUT "Wed"

E ENDCASE

Question 4

A DECLARE Choice : INTEGER

B CASE OF Choice

C 1 : OUTPUT "Add"

D "2" : OUTPUT "Delete"

E ENDCASE

Question 5

A INPUT Key

B CASE IF Key

C 'Y' : OUTPUT "Yes"

D 'N' : OUTPUT "No"

E ENDCASE

Answer Key

CASE OF…ENDCASE (8.1b)

Section A: Quick Questions

B — CASE OF Choice

A — ENDCASE

A — 1 : OUTPUT "Start"

A — One value per line, each with its own statement

B — Runs the statement beside the value 2

Section B: Match the Pairs

CASE OF Choice → Starts a CASE statement that compares the variable Choice with a list of values

ENDCASE → Closes the CASE statement after the last value has been listed

Each value is written with a colon, then the statement that runs when the variable matches that value → 1 : OUTPUT "Start"

A CASE statement can test a CHAR variable, with each CHAR value written one per line → CASE OF Grade 'A' : OUTPUT "Top" 'B' : OUTPUT "Good" ENDCASE

CASE OF Choice 1 : OUTPUT "Start" 2 : OUTPUT "Quit" → ENDCASE is missing, so the CASE statement is never closed. Add ENDCASE after the last value.

CASE OF Choice 1 OUTPUT "Start" 2 OUTPUT "Quit" ENDCASE → The colon is missing between each value and its statement. It should be 1 : OUTPUT "Start".

Section C: Definitions

CASE OF Choice — Compares one variable (here Choice) with a list of values, runs the statement beside the matching value, and is closed by ENDCASE.

Section D: Fill in the Blanks

CASE OF Choice
   1 : OUTPUT "Start"
ENDCASE

CASE OF Choice
   1 : OUTPUT "Start"
ENDCASE

CASE OF Choice
   2 : OUTPUT "Quit"
ENDCASE

CASE OF Grade
   'A' : OUTPUT "Top mark"
ENDCASE

CASE OF Choice
   2 : OUTPUT "Quit"
ENDCASE

Section E: Spot the Error

A — The CASE line is missing the keyword OF. It should be CASE OF Choice.

D — A CASE clause needs a colon between the value and the statement, not an equals sign. It should be 'B' : OUTPUT "Good".

C — The text in the OUTPUT statement is missing its closing quote. It should be OUTPUT "Tue".

D — Choice is an INTEGER, so each value must be a whole number without quotes. It should be 2 : OUTPUT "Delete".

B — A CASE statement starts with CASE OF, not CASE IF. IF belongs to selection with a condition. It should be CASE OF Key.