JavaScript has several data types including numbers, strings, and Booleans. It uses various operators for assignment, comparison, arithmetic, bitwise, logical, and string operations. Control flow is handled with if/else statements and loops like for and while. Functions are declared with the function keyword followed by a name, parameters, and curly braces containing statements to execute.

1. JavaScript Basics

2. Data Types
• Numbers
• Strings
• Boolean
• JS is a dynamically typed language

3. Operators
• Assignment operators = , +=
• Comparison operators == , != , < , >
• Arithmetic operators +, - , /, *
• Bitwise operators
• Logical operators
• String operators
• Special operators

4. Control Flow
if (condition)
statement_1
[else
statement_2]

5. Loop
for ([initialExpression]; [condition];
[incrementExpression])
statement
while (condition)
statement

6. Functions
A function definition (also called a function
declaration) consists of the function keyword,
followed by
• The name of the function.
• A list of arguments to the function, enclosed
in parentheses and separated by commas.
• The JavaScript statements that define the
function, enclosed in curly braces, { }.

7. function square(number) {
return number * number;
}