#javascript

An overview of JavaScript's primitive and non-primitive data types, how to declare and reassign variables with let and const, and tools like typeof and console.log for debugging.

String manipulation in JavaScript — bracket notation, template literals, escape sequences, and essential methods like indexOf, slice, replace, and trim.

Arithmetic operators, type coercion, comparison and logical operators, truthy and falsy values, the Math object, and methods for converting and formatting numbers.