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AP Computer Science Principles
Big Idea 3: Algorithms and Programming
3.2 Variables and Data Types
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Cards (126)
The value assigned to a variable must match its declared
data type
.
True
Variables are referred to by their names in a
program
.
True
What is a float in programming?
A number with a decimal
In Python, an integer variable can be declared as
age = 25
A float is used to store numbers with decimal
points
In Python, an integer variable can be declared as
age = 25
Which data type is used to store "True" or "False" values in Python?
Boolean
What is the primary characteristic of a variable's value?
It can be updated
What type of data is stored in a string variable?
Text or characters
What is an integer used for in programming?
Whole numbers
What type of numbers are stored in a float variable?
Decimal numbers
Give an example of an integer value.
42
What is the value of a boolean variable that represents a false condition?
False
The assignment operator in Python is
equal
The assignment operator `=` is used to store a value in a
variable
.
True
Each variable must be declared with a name and a data
type
An integer is a whole number without decimal
points
What are the possible values of a boolean data type?
True or False
What is an integer used for in programming?
Whole numbers
What is a boolean variable used for in programming?
True or False values
The string variable `name` is assigned the value `"Alice"` in Python.
True
Each variable is referred to by its unique name in
programming
.
True
A float can store numbers with decimal points in programming.
True
In Python, declaring an integer variable requires using the keyword `int`.
False
A boolean variable can only store two values: True or
False
.
True
Variables must be declared before they can be used in a program.
True
A string variable in
Python
can store text or characters.
True
Match the data type with its example:
Integer ↔️ 42
Float ↔️ 3.14
String ↔️ "Hello"
Boolean ↔️ True
What is the second step in assigning a value to a variable?
Use the assignment operator
The first step in assigning a value to a variable is to
declare
Before assigning a value, a variable must be
declared
What are the four common data types mentioned in the study material?
Integer, float, string, boolean
To use a variable, you must first
declare
What are two examples of integer variables declared in Python?
age, count
What are two examples of boolean variables declared in Python?
is_student, is_valid
Integer variables are used to store
whole
numbers without decimal points.
An example of an integer value is
42
A variable is a named storage location in a computer's
memory
used to hold values.
The data type for whole numbers without decimals is called an
integer
Variables hold a specific
value
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