JavaScript Variables and Data Types

What is the data type used to represent whole numbers in JavaScript?

• Integer

• Array

• Boolean

• String

Which of the following is NOT a basic data type in JavaScript?

• Boolean

• Object

• String

• Character

How can you write JavaScript directly in a web browser?

• Using the console tab in developer tools

• Writing it in the URL bar

• Creating a .js file and opening it

• Sending it via email to yourself

What does the Boolean data type represent?

• Numbers

• Lists

• True/False conditions

• Text

What syntax is used to denote an array in JavaScript?

• Angle brackets <>

• Parentheses ()

• Square brackets []

• Curly braces {}

Which data type is used for decimal numbers in JavaScript?

• Double

• Decimal

• Float

• Integer

What is string concatenation in JavaScript?

• Combining two arrays

• Adding two numbers

• Gluing two strings together

• Converting a boolean to a string

How do you declare a variable in JavaScript?

• variable variableName

• var variableName

• var = variableName

• declare variableName

What is the purpose of variables in programming?

• To debug applications

• To change the syntax of the code

• To perform complex calculations

• To store data values

Which operator is used for string concatenation?

• +

• -

• /

• *