identifiers.java

public class identifiers {
    public static void main(String[] args) {
        //String first name = " shainky "// no white space is allow
        String firstname = " shainky";
        final double INTEREST_RATE = 8.9;// constant not be changed 
        System.out.println("hello world");
  

//1. there are 53 keyword in java
//2. and 8 data type
//3 . these are all the identifiers
// public-keyword
//class-keyword
//class name-name of a class or user defined
//static- keyword
//void-keyword
// main-name of a method- or user defined
//string- name of a class - API class- java.lang.String-predefined 
//args-variable of type String
//system-name of a class - java.lang.system- predefined class
//out-variable-system-static
//println-name of a method- predefined method-printStream
//hello java-literl or string literal




// variable = hold a data iteam of some type
// String[] args
// int x;// whole
//double age;// number
//boolean status;//{true,false}
//data typ:identifier(keyword)


// variable declaration
int age;
String name;
boolean status;

//initialiazation 
int a = 1;
float b = 3.14f;
double salary = 6789;

// variable assignment
age = 90;
status = false;




// constant

//1. final 
}
}