Identifiers in Pascal case (7a)

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Date:

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Quick Questions

Shade in the A or B circle for each question.

1. Which identifier follows Cambridge Pascal case?

A number_of_players

B NumberOfPlayers

2. Which identifier is written correctly?

A TotalScore

B Total Score

3. Which identifier is NOT allowed?

A Place1

B 1stPlace

4. Which identifier is the better, more meaningful name for storing a student's age?

A StudentAge

B X

5. In Cambridge pseudocode, Countdown and CountDown refer to...

A The same variable

B Two different variables

Match the Pairs

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

Left column		Right column
1NumberOfPlayers		AThe identifier starts with a digit. It must start with a letter, for example SecondPlayer.
2Score2		BA good identifier in Pascal case: a capital letter starts each word and there are no spaces or underscores
3An identifier must not contain spaces or underscores, so each word is joined and starts with a capital letter		CCountdown and CountDown
4Identifiers are not case sensitive, so these two names refer to the same variable		DA valid identifier that uses a digit, which is allowed because it does not come first
5DECLARE 2ndPlayer : STRING		EThe identifier uses underscores and no capital letters. Pascal case would be NumberOfPlayers.
6DECLARE number_of_players : INTEGER		FTotalScore

Definitions

NumberOfPlayers

Fill in the Blanks

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

// Stores how many people are playing DECLARE _______________ : INTEGER

DECLARE Score : INTEGER Score ← 0 _____ ← Score + 1

_______ HighScore : INTEGER

DECLARE FirstName : STRING OUTPUT "Enter your first name" INPUT _________

// Is the game finished? DECLARE GameOver : _______

Spot the Error

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

Question 1

A DECLARE PlayerName : STRING

B DECLARE PlayerScore : INTEGER

C DECLARE High_Score : INTEGER

D OUTPUT PlayerName

Question 2

A DECLARE TotalMarks : INTEGER

B TotalMarks ← 0

C Total Marks ← TotalMarks + 5

D OUTPUT TotalMarks

Question 3

A DECLARE FirstScore : INTEGER

B DECLARE 2ndScore : INTEGER

C INPUT FirstScore

D INPUT SecondScore

Question 4

A DECLARE PlayerAge : INTEGER

B DECLARE favColour : STRING

C INPUT PlayerAge

D INPUT FavColour

Question 5

A DECLARE Price : REAL

B DECLARE Quantity : INTEGER

C DECLARE x : REAL

D TotalCost ← Price * Quantity

Answer Key

Identifiers in Pascal case (7a)

Section A: Quick Questions

B — NumberOfPlayers

A — TotalScore

B — 1stPlace

A — StudentAge

A — The same variable

Section B: Match the Pairs

NumberOfPlayers → A good identifier in Pascal case: a capital letter starts each word and there are no spaces or underscores

Score2 → A valid identifier that uses a digit, which is allowed because it does not come first

An identifier must not contain spaces or underscores, so each word is joined and starts with a capital letter → TotalScore

Identifiers are not case sensitive, so these two names refer to the same variable → Countdown and CountDown

DECLARE 2ndPlayer : STRING → The identifier starts with a digit. It must start with a letter, for example SecondPlayer.

DECLARE number_of_players : INTEGER → The identifier uses underscores and no capital letters. Pascal case would be NumberOfPlayers.

Section C: Definitions

NumberOfPlayers — An identifier: a variable name in Pascal case. Capital letter starts each word, letters and digits only, no spaces or underscores, can't start with a digit. Not case sensitive.

Section D: Fill in the Blanks

// Stores how many people are playing
DECLARE NumberOfPlayers : INTEGER

DECLARE Score : INTEGER
Score ← 0
Score ← Score + 1

DECLARE HighScore : INTEGER

DECLARE FirstName : STRING
OUTPUT "Enter your first name"
INPUT FirstName

// Is the game finished?
DECLARE GameOver : BOOLEAN

Section E: Spot the Error

C — Identifiers must not contain underscores. In Pascal case the words are joined and each starts with a capital letter, so it should be HighScore.

C — An identifier cannot contain a space. 'Total Marks' would be read as two separate names. It should be TotalMarks.

B — An identifier cannot start with a digit. Spell the number as a word, for example SecondScore.

B — Pascal case starts every word with a capital letter, including the first. It should be FavColour, not favColour.

C — Identifiers should be meaningful. The single letter x does not say what the variable stores. It should be TotalCost, which matches the calculation on the next line.