Intro To Variables

What is a variable?

• A piece of information that changes in an app

• A way to leverage a computer's memory

• A container for storing a value

• A label used to refer to a value in memory

How are variables stored in a computer's memory?

• As labels

• As values

• As containers

• As pieces of information

Anika is writing a program and she needs to use a variable 'x'. Oliver suggests her to initialize 'x' before using it. Isla is curious and asks, what are the two purposes of initializing a variable 'x'?

• To delete the variable 'x'

• To update its value

• To assign it a value

• To create the variable 'x'

What is the assignment operator in programming?

• The minus sign (-)

• The equal sign (=)

• The plus sign (+)

• The multiplication sign (*)

How can you display the value of a variable?

• Using the assignment operator

• Using the equal sign

• Using quotes

• Using console.log

What happens if you refer to a variable that hasn't been created?

• The variable is assigned a default value

• The program crashes

• The variable is automatically created

• The computer gives an error

What is the purpose of console.log?

• To update the value of a variable

• To display the value of a variable

• To create a new variable

• To delete a variable

What is the difference between text in quotes and a variable label?

• Text in quotes is a literal string, while a variable label refers to a value in memory

• Text in quotes is a variable, while a variable label is a literal string

• Text in quotes is a number, while a variable label is a string

• Text in quotes is a value in memory, while a variable label is a literal string

What is the purpose of a variable in an app?

• To perform calculations

• To keep track of changing information

• To display information on the screen

• To store static information