Chapter 3

Question 1

Comment

Answer 1

A line of code written in English preceded by #

Question 2

Print

Answer 2

print(“”) or print(‘’)

Prints whatever character input between the parenthesis

Question 3

Line

Answer 3

Programs are made up of lines of code.

Question 4

Keywords

Answer 4

Words with special meaning.

Question 5

Data Types

Answer 5

Python groups data into different categories.

Question 6

Object

Answer 6

Each data value. ie. 2 or “Hello, world!”

Question 7

3 Properties of an Object

Answer 7

1. Identity
2. Data Type
3. Value

Question 8

Object’s Identity

Answer 8

Location in your computer’s memory, which never changes.

Question 9

Object’s Data Type

Answer 9

Category of data the object belongs to, which determines the properties of the object, which never changes.

Question 10

Object’s Value

Answer 10

The data it represents ie. the number 2. Value of 2.

Question 11

“Hello, world!” Object Properties

Answer 11

1. Data Type: str == string
2. Value: “Hello, world!”
   aka a string

Question 12

string

Answer 12

A sequence of one or more characters surrounded by quotes.

Question 13

character

Answer 13

A single symbol. ie. ‘a’ or ‘1’.

Question 14

Integer

Answer 14

int;

represents whole numbers

Question 15

int Properties

Answer 15

Able to multiply(*), divide(/), add(+), subtract(-).

Question 16

float

Answer 16

float;

represents decimal numbers

Question 17

booleans

Answer 17

bool;

True or False statements.

Question 18

NoneType

Answer 18

value None;

Used to represent the absence of value.

Question 19

Constant

Answer 19

Value that never changes.

eg. 2 will always represent the value 2

Question 20

Variable

Answer 20

Value that can change.

eg. b = 100; b = 200

Question 21

Assignment Operator

Answer 21

(=);

Assign the variables name a value.

Question 22

Increment Value of a Variable

Answer 22

Increases the value of a variable.

eg. x = x + 1 or x = x += 1

Question 23

Decrement Value of a Variable

Answer 23

Decreases the value of a variable.

eg. x = x - 1 or x -= 1

Question 24

4 Rules for Naming a Variable

Answer 24

1. Variables cannot have spaces.
2. Letters, numbers, and underscore.
3. Cannot start name with a number.
4. Cannot use keywords as names.

Question 25

Syntax

Answer 25

Set of rules, principles, and processes that govern the structure of sentences in a given language, specifically word order.

Question 26

Syntax Error

Answer 26

Errors that are fatal and program will not run.

Question 27

Exception

Answer 27

Any error that is not a syntax error. Not necessarily fatal.

Question 28

Arithmetic Operators

Answer 28

Symbols that perform arithmetic.

Question 29

Arithmetic Operators: Symbols

Answer 29

1. ’+’ addition
2. ’-‘ subtraction
3. ‘*’ multiplication
4. ’/’ division
5. ‘**’ exponent
6. ’%’ remainder
7. ’//’ integer division/floored quotient

Question 30

Operand

Answer 30

Value on either side of an operator.

eg. print(4/2) # ‘4’ & ‘2’ are the operands

Question 31

Expression

Answer 31

An operator surrounded by two operands.

eg. print(4/2) #”4/2” is the expression

Question 32

Order of Operations

Answer 32

Parenthesis
Exponent
Multiplication
Division
Addition
Subtraction

Question 33

Comparision Operator

Answer 33

Category of operators used in an expression that evaluate either true or false.

Question 34

Comparison Operators: Symbols

Answer 34

1. ’>’ greater than
2. ’=’ greater than or equal to
3. ’<=” less than or equal to
4. ’==’ equal
5. ’!=’ not equal

Question 35

Logical Operators

Answer 35

Evaluate two expressions and return either True or False.

Question 36

List the Logical Operators

Answer 36

1. and: Returns true if both statements are true.
2. or: Returns true if one of the statements are true.
3. not: Returns the opposite of the result.

Question 37

Conditional Statements

Answer 37

Code that can execute additional code conditionally.

Question 38

List the Conditional Statements

Answer 38

1. if: Firstly, define a condition for the code to meet and execute.
2. elif: Combines the two statements as an if-else statement.
3. else: Secondly, False “if-statement”, define another condtion which the code will execute.