Understanding Variables and Data Types

What is a variable in programming?

• A variable is a fixed value that cannot change.

• A variable is a type of function that performs calculations.

• A variable is a command that executes a program.

• A variable is a symbolic name for a storage location that can hold data and whose value can change.

How can you assign a value to a variable?

• Set a variable by using a function call.

• Use the assignment operator to set a variable, e.g., x = value.

• Use a comparison operator to define a variable.

• Assign a value by declaring a constant.

What data type would you use to store the number 15?

• string

• integer

• boolean

• float

What is the data type for a decimal number like 3.14?

• boolean

• string

• float

• integer

What is the purpose of data types in Python?

• To create user interfaces in Python

• To define the syntax of Python code

• The purpose of data types in Python is to define the kind of data a variable can hold

• To determine the speed of a program

How do you denote a string in Python?

• Strings are denoted by brackets.

• Strings are denoted by angle brackets.

• Strings in Python are denoted by single or double quotes.

• Strings are denoted by parentheses.

What would be the data type of the variable 'my_age' if it is set to 16?

• string

• boolean

• float

• integer

Can you store negative numbers in an integer variable?

• Negative numbers can only be stored in float variables.

• No, integers can only be positive numbers.

• You cannot store any numbers in an integer variable.

• Yes, you can store negative numbers in an integer variable.

What is the difference between an integer and a float?

• An integer is a number with a fractional part; a float is a whole number.

• An integer can have decimals; a float cannot.

• An integer is a whole number; a float is a number that can have decimals.

• Both integers and floats can only be positive numbers.

Give an example of a string variable in Python.

• example_string = 'Hello, World!' 123

• example_string = 'Hello, World!'

• example_string = "Hello, World!"

• example_string = 'Hello World'