Camel casing

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. Which variable name uses camelCase?

A studentScore

B StudentScore

2. Which name is NOT camelCase?

A studentScore

B student_score

3. Which is the correct camelCase version of 'total game points'?

A totalGamePoints

B totalgamepoints

4. A class is named using PascalCase. Which name fits?

A BankAccount

B bankAccount

5. Which variable name follows camelCase rules?

A first name

B firstName

Match the Pairs

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

Left column		Right column
1studentScore		AA camelCase variable name: first word lowercase, later word capitalised, no spaces
2class BankAccount:		BThe first word is capitalised. In camelCase a variable should start lowercase: studentScore.
3A camelCase name for a variable holding a player's total points		CA PascalCase class name: every word starts with a capital letter, including the first
4A PascalCase name for a class that models a library book		Dclass LibraryBook:
5StudentScore = 85		EThe name has a space in it. Camel casing joins words with no spaces: studentScore.
6student score = 85		FtotalPoints = 0

Definitions

camelCase

Fill in the Blanks

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

let studentScore = 85; console.log(____________);

class StudentRecord {} let record = new _____________();

___ highScore = 90; console.log(highScore);

let mathsMark = 70; let englishMark = 80; let totalMarks = mathsMark _ englishMark;

let firstName = "Ava"; let lastName = "Nguyen"; let fullName = firstName + " " + ________;

Spot the Error

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

Question 1

A let studentScore = 85;

B let StudentScore = 85;

C console.log(studentScore);

Question 2

A let firstName = 'Ava';

B let lastname = 'Nguyen';

C let lastname = 'Nguyen';

Question 3

A class studentRecord {

B constructor(name) {

C this.name = name;

D }

E }

Question 4

A let maxSpeed = 120;

B let currentSpeed = 80;

C let speedLimit = 100;

D let FUELLEVEL = 40;

Question 5

A class GameScore {

B constructor() {

C this.highScore = 0;

D this.PlayerName = 'Ava';

E }

F }

Answer Key

Camel casing

Section A: Quick Questions

A — studentScore

B — student_score

A — totalGamePoints

A — BankAccount

B — firstName

Section B: Match the Pairs

studentScore → A camelCase variable name: first word lowercase, later word capitalised, no spaces

class BankAccount: → A PascalCase class name: every word starts with a capital letter, including the first

A camelCase name for a variable holding a player's total points → totalPoints = 0

A PascalCase name for a class that models a library book → class LibraryBook:

StudentScore = 85 → The first word is capitalised. In camelCase a variable should start lowercase: studentScore.

student score = 85 → The name has a space in it. Camel casing joins words with no spaces: studentScore.

Section C: Definitions

camelCase — A naming style with no spaces: the first word is lowercase and each later word starts with a capital letter, like studentScore. PascalCase also capitalises the first word.

Section D: Fill in the Blanks

let studentScore = 85;
console.log(studentScore);

class StudentRecord {}
let record = new StudentRecord();

let highScore = 90;
console.log(highScore);

let mathsMark = 70;
let englishMark = 80;
let totalMarks = mathsMark + englishMark;

let firstName = "Ava";
let lastName = "Nguyen";
let fullName = firstName + " " + lastName;

Section E: Spot the Error

B — A camelCase variable name must start with a lowercase letter. StudentScore is PascalCase, which is for class names. It should be studentScore.

C — In camelCase every word after the first starts with a capital letter. lastname should be lastName so the two words are easy to see.

A — Class names use PascalCase, so the first word is capitalised too. It should be StudentRecord, not studentRecord.

D — All capitals with no word breaks is not camelCase. The first word is lowercase and the second word starts with a capital, so it should be fuelLevel.

D — Properties inside a class use camelCase, which starts with a lowercase letter. PlayerName should be playerName.