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Course Content

Introduction to JavaScript


You have completed all the chapters! This is fantastic! Review what you have learned throughout the course and take a quiz.

Variables and Constants

  • Variable (let) is named storage of value for the multiple usages.
  • Constant (const) is an unchangeable variable.

Data Types

  • number is a numeric data type.
  • string is a text data type. Writing in quotes (" or ').
  • boolean is a logical data type (true or false).
  • array is a collection of values. The most commonly used methods are push(), pop(), unshift() and shift().

Basic operations

  • Assignment (=).
  • Math (+, -, *, etc.).
  • Comparison (>=, <, ==, ===, etc.).
  • Logical (AND &&, OR (||).
  • String Concatenation (+ between strings).

Conditional Statements

  • if (condition) {code block}
  • else {code block} after if.
  • else if (condition) {code block} for a few conditions.


  • while (condition) {code block}.
  • do (code block) while (condition).
  • for (let counter; condition; counter++) {code block}.


  • function myFunc(arg1, arg2, arg3) {code block}
  • Call the function: myFunc(value1, value2, value3)
  • Use the return keyword to return the value from a function.


Congratulations! You've successfully completed the 'Introduction to JavaScript' course, mastering the basics of JS. If you're eager to delve deeper into this fantastic programming language, you're invited to join the 'JavaScript Data Structures' course, where we'll explore more about data in JS.

1. Conditional Statements are used to:
2. Loops are used to:
3. Functions are used to:


Conditional Statements are used to:

Select a few correct answers


Loops are used to:

Select the correct answer


Functions are used to:

Select a few correct answers

Everything was clear?

Section 6. Chapter 7