learning in subex

public class variable {     public static void main (String[] args)     {         System.out.println("Hello this is the example of printing variables");         int my_first_intvar=(10 + 20)/(4);                       // we can define a expression         int seco;         seco =10;         int thr;         thr=20;         int mytot=1000- (my_first_intvar+seco+thr);  //variable should use camelCase                         System.out.println("Hi the value in the variable is " + mytot);//variable printing must be done without quotes     } }