JavaScript for Beginners freeCodeCamp

• Who is the instructor of the Beginner’s Javascript course?

  Beau Carnes
• What is the target audience for the Beginner’s Javascript course?

  Beginners or those needing a refresher
• How does this course relate to freeCodeCamp.org?

  It follows the freeCodeCamp Javascript curriculum
• What should you do after completing the course?

  Create some Javascript projects on your own
• What is one way to write Javascript code?

  Using a code editor like Sublime Text
• What is the purpose of the <script> tags in HTML?

  To include Javascript code in HTML files
• What does console.log do in Javascript?

  Displays output in the console
• What is CodePen used for?

  To create and test HTML, CSS, and Javascript
• What is the first thing discussed in the course?

  Comments in Javascript
• What are comments in Javascript used for?

  To create notes that are ignored by the code
• How do you create an in-line comment in Javascript?

  Using // before the comment
• What is the difference between undefined and null in Javascript?

  Undefined means not defined; null means explicitly nothing
• How many data types does Javascript provide?

  Seven different data types
• What is a boolean in Javascript?

  A data type that can be true or false
• What does a variable do in Javascript?

  Stores and manipulates data dynamically
• What keyword is used to declare a variable in Javascript?

  var
• What is the difference between var, let, and const?

  Var is global; let is block-scoped; const is immutable
• What happens if you try to change a const variable?

  You will get an ERROR
• What is the assignment operator in Javascript?

  =
• What is the purpose of a semicolon in Javascript?

  To indicate the end of a statement
• What does console.log allow you to do?

  See variable values in the console
• What does initializing a variable mean?

  Setting it to an initial value
• What is case sensitivity in variable names?

  Capitalization matters in variable names
• What operator is used for addition in Javascript?

  +
• How do you subtract numbers in Javascript?

  Using the subtraction sign (-)
• What symbol is used for multiplication in Javascript?

  *
• How do you divide numbers in Javascript?

  Using the division sign (/)
• What does incrementing a number mean?

  Adding 1 to the number
• What operator is used to increment a number?

  ++
• What does decrementing a number mean?

  Subtracting 1 from the number
• What is a decimal number in Javascript?

  A number with a decimal point
• How do you multiply decimal numbers in Javascript?

  Using the same method as integers
• What does the remainder operator (%) do?

  Gives the remainder of division
• How can the remainder operator be used?

  To determine if a number is even or odd
• What is the result of 11 % 3?

  2
• What are the main data types in Javascript?

  • Undefined
  • Null
  • Boolean
  • String
  • Symbol
  • Number
  • Object
• What are the three ways to declare a variable in Javascript?

  1. var
  2. let
  3. const
• What are the differences between var, let, and const?

  • Var: function-scoped or globally scoped
  • Let: block-scoped
  • Const: immutable variable
• What are the basic arithmetic operations in Javascript?

  1. Addition (+)
  2. Subtraction (-)
  3. Multiplication (*)
  4. Division (/)
  5. Remainder (%)
• What are the methods to log output in Javascript?

  • console.log
  • Popup alerts