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.

Loops

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

Functions

• 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.