PYTHON -- variables

Variable names _____________.

Check all that apply.

• must not begin with a number

• can only contain the characters A-Z, a-z, 0-9, and _ .

• letters must be lower case

• letters can be upper case, but NOT at the beginning of the variable name

In Python, can string variables be declared using both single and double quotes?

• Yes, they are interchangeable

• No, only single quotes can be used

• No, only double quotes can be used

• No, strings cannot be declared with quotes

In Python, are variable names case-sensitive?

• Yes, variable names are case-sensitive

• No, variable names are not case-sensitive

• Only the first character in the variable name is case-sensitive

• Case sensitivity depends on the version of Python

In the following code, what value will be assigned to the variable "cat"?

mouse + cat + dog = "small" + "medium" + "large"

• small, medium, large

• small

• medium

• large

• Nothing, that operation will throw an error

num = 90

num = 20

print(num)

• 90

• 4.5

• 20

• 1800

Which of the following options are valid variable names?

Check all that apply.

• 1st_name

• first_name

• first Name

• f1_name

• firstName

Variables are used _________.

• to store data

• to print data

• to produce functions

What does the following Python program print?

x = "Hello World!"

y = "I can code "

z = " In Python"

print( x + y + z)

• Hello World! I can code In Python

• Hello World!I can code InPython

• Hello World! I can codeIn Python

• Hello World!I can code In Python

• xyz

Why the following variable name invalid for python:

1st_Name = 153156456456415

• It includes special characters other than underscore

• The variable name starts with a number

• Keep names meaningful

• There is nothing wrong with this variable name

When each word of the variable name, except the first, starts with a capital letter, it's an example of ________.

• Camel Case

• Pascal Case

• Snake Case

• No Case