main.java

public class main{
    public static void main(String args[]){
        System.out.println("hello world");

        String name ="Manya";
        int a= 2;
        float b= 3.2f;
        boolean isAdult= false;
        System.out.println(name);
        System.out.println(a);
        System.out.println(b);
        System.out.println(isAdult);
    



/* rules for naming variables
 can contain digits, dollar sign, letters, underscore
 should begin with letter, $ or _
 java is case sensitive language whcih means manya and Manya are diff variables
 should not contain whitespaces
 */

 /* two types of data types
 1. primitive - byte(1 byte), short(2 bytes), int, long, float, double, char, boolean(1bit) 
 2. non-primitive/ reference - 
  */

  byte u= 56;
  //byte= 156 ---->error
  System.out.println(u);

   }

}