What are Identifiers in JAVA ? | Java Basics-2 | Java E-Learn Platform @StudyEcart

Identifiers or User defined Words are simple names that will be used to identify the programming elements. For Example: Classes,methods,variables,.etc..

Main Rules should follow to define Identifiers:

Rule-I: When you declare Identifier, you can take Alphabet, Digits, and two special symbols,i.e Dollar[ $ ] and Underscore [ _ ] Rule-II: Always take the first character must be Alphabet or Dollar [ $ ] or Underscore [ _ ] Rule-III: Shouldn't take Reserved words or Keywords as Identifiers

Code Example:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20	package elearn.studyecart.basics; //public class 12IdentidersEx { // not valid Identifier public class IdentidersEx { public static void main(String[] args) { int var=100;//valid Identifier // float 1value=123; // Not valid Identifier String intfloat="StudyEcart";//valid Identifier String get_Name="Pedro";//valid Identifier byte small$val=100;//valid Identifier } }