Defining a procedure with one parameter

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Quick Questions

Shade in the A or B circle for each question.

1. Which header correctly defines a procedure with one parameter called Size?

A PROCEDURE Line(Size : INTEGER)

B PROCEDURE Line(INTEGER : Size)

2. Which procedure header is written correctly?

A PROCEDURE Greet(Name : STRING)

B PROCEDURE Greet(Name STRING)

3. Where is the parameter written when you define a procedure?

A On the line after ENDPROCEDURE

B In brackets straight after the procedure name

4. Which keyword ends the definition of a procedure?

A ENDPROCEDURE

B ENDFUNCTION

5. A procedure is defined as PROCEDURE Greet(Name : STRING). Which line inside the body outputs the value that was passed in?

A OUTPUT "Hello Name"

B OUTPUT "Hello ", Name

Match the Pairs

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

Left column		Right column
1PROCEDURE Line(Size : INTEGER)		AThe identifier and data type are the wrong way round. The identifier comes first, then the colon, then the type: Size : INTEGER.
2PROCEDURE ShowName(Name : STRING)		BThe colon is missing between the parameter name and its data type. It should be Size : INTEGER.
3A parameter is used inside the procedure body like a variable, for example to output its value		CPROCEDURE ShowPrice(Price : REAL) OUTPUT Price ENDPROCEDURE
4A procedure with a REAL parameter ends with ENDPROCEDURE after its body		DOUTPUT Size
5PROCEDURE Line(Size INTEGER)		EStarts a procedure called Line with one parameter, Size, which must hold a whole number
6PROCEDURE Line(INTEGER : Size)		FStarts a procedure with one parameter, Name, that holds text

Definitions

PROCEDURE Line(Size : INTEGER)

Fill in the Blanks

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

PROCEDURE Line(Size : _______) OUTPUT Size ENDPROCEDURE

_________ Greet(Name : STRING) OUTPUT "Hello ", Name ENDPROCEDURE

PROCEDURE ShowPrice(Cost : REAL) OUTPUT Cost ____________

PROCEDURE Line(Size : INTEGER) OUTPUT ____ ENDPROCEDURE

PROCEDURE Greet(Name _ STRING) OUTPUT Name ENDPROCEDURE

Spot the Error

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

Question 1

A PROCEDURE Line(Size : INTEGER)

B FOR Count ← 1 TO Length

C OUTPUT "*"

D NEXT Count

E ENDPROCEDURE

Question 2

A PROCEDURE Greet(Name : STRING)

B OUTPUT "Hello "

C OUTPUT Name

D ENDFUNCTION

Question 3

A PROCEDURE ShowTotal(Cost, REAL)

B OUTPUT "Total: ", Cost

C ENDPROCEDURE

Question 4

A PROCEDURE Box(Side : INTEGER)

B DECLARE Area : INTEGER

C Area ← Side * Side

D OUTPUT Size

E ENDPROCEDURE

Question 5

A PROCEDURE Stars(Num : INTEGER)

B FOR Count ← 1 TO Num

C OUTPUT "*

D NEXT Count

E ENDPROCEDURE

Answer Key

Defining a procedure with one parameter

Section A: Quick Questions

A — PROCEDURE Line(Size : INTEGER)

A — PROCEDURE Greet(Name : STRING)

B — In brackets straight after the procedure name

A — ENDPROCEDURE

B — OUTPUT "Hello ", Name

Section B: Match the Pairs

PROCEDURE Line(Size : INTEGER) → Starts a procedure called Line with one parameter, Size, which must hold a whole number

PROCEDURE ShowName(Name : STRING) → Starts a procedure with one parameter, Name, that holds text

A parameter is used inside the procedure body like a variable, for example to output its value → OUTPUT Size

A procedure with a REAL parameter ends with ENDPROCEDURE after its body → PROCEDURE ShowPrice(Price : REAL) OUTPUT Price ENDPROCEDURE

PROCEDURE Line(Size INTEGER) → The colon is missing between the parameter name and its data type. It should be Size : INTEGER.

PROCEDURE Line(INTEGER : Size) → The identifier and data type are the wrong way round. The identifier comes first, then the colon, then the type: Size : INTEGER.

Section C: Definitions

PROCEDURE Line(Size : INTEGER) — Defines a procedure with one parameter. In the brackets after the name, write the parameter identifier, a colon, then its data type. Size is used inside the body.

Section D: Fill in the Blanks

PROCEDURE Line(Size : INTEGER)
  OUTPUT Size
ENDPROCEDURE

PROCEDURE Greet(Name : STRING)
  OUTPUT "Hello ", Name
ENDPROCEDURE

PROCEDURE ShowPrice(Cost : REAL)
  OUTPUT Cost
ENDPROCEDURE

PROCEDURE Line(Size : INTEGER)
  OUTPUT Size
ENDPROCEDURE

PROCEDURE Greet(Name : STRING)
  OUTPUT Name
ENDPROCEDURE

Section E: Spot the Error

B — The parameter is called Size, so the loop must use Size. Length is not defined anywhere. It should be FOR Count ← 1 TO Size.

D — A procedure must finish with ENDPROCEDURE. ENDFUNCTION is used to close a function.

A — A parameter is written as identifier, colon, data type. The comma should be a colon: ShowTotal(Cost : REAL).

D — The parameter is named Side, so Size does not exist in this procedure. The line should output the calculated value: OUTPUT Area.

C — The string is missing its closing quotation mark. It should be OUTPUT "*".