Skip to content
skillbld
Day 1 of 14 30 minEnginesconsole.log()Statements

What JavaScript is, where it runs, how an engine runs your code, and your first lines of JavaScript.

By the end of today you can

  • Explain what JavaScript is and where it runs
  • Describe how a JavaScript engine turns code into results
  • Print values with console.log and friends
  • Write statements and comments, and read an error message

What's inside

  • 9 sections
  • 3 diagrams and mind maps
  • 7 code examples you can run
  • 5-question quiz
  1. 1What is JavaScript?
  2. 2Where JavaScript runs
  3. 3Your first line of code
  4. 4How an engine runs your code
  5. 5Statements and semicolons
  6. 6Comments
  7. 7More than console.log
  8. 8Reading error messages
  9. 9A small program

Sign in free to read this lesson

Get the full lesson with diagrams, runnable code and the quiz. Your progress is saved across devices.

Sign in free
Day 1: Hello, JavaScript · JavaScript · SkillBld