#2-Known is a drop! JAVA - Datatypes

Data types in JAVA A datatype in programming defines the type of data a variable can hold,** how much memory** it occupies, and what operations can be performed on it. Java is a statically-typed programming language because variable types are checked at compile time and must be explicitly declared. Java has primitive data types and non primitive datatypes. variable Nomenclature: ✅ Rules Must start with a letter, _, or $ Cannot start with a number Cannot use Java keywords Case-sensitive No spaces allowed ✨ Conventions (Best Practice) Use camelCase → studentAge, totalMarks Use meaningful names Avoid single-letter names (except i, j in loops) Constants → UPPERCASE (MAX_SIZE, PI) Primitive datatype: Why byte size matters for different data types: Range matters because it defines what numbers a variable can safely store. Too small → overflow / wrong results Too large → wastes memory Understanding 2's complement: Default Values It's not always necessary to assign a value when a field is decl