What is the output of this program?

class area
 {
       

What is the output of this program?

class area
 {
         public static void main(String args[])
          {
                  double r, pi, a;
              r = 9.8;
              pi = 3.14;
              a = pi * r * r;
              System.out.println(a);
         }
      }

2) What is the output of this program?

class increment
 {
         public static void main(String args[])
          {
                      int g = 3;
              System.out.print(++g * 8);
         }
      }

3) What is the output of this program?

class mainclass
 {
         public static void main(String args[])
          {
             char a = 'A';
             a++;
 	    System.out.print((int)a);
         }
      }

4) What is the output of this program?

class booloperators
 {
         public static void main(String args[])
          {
             boolean var1 = true;
 	    boolean var2 = false;
 	    System.out.println((var2 & var2));
         }
      }

5) What is the output of this program?
class asciicodes
{
public static void main(String args[])
{
char var1 = 'A';
char var2 = 'a';
System.out.println((int)var1 + " " + (int)var2);
}
}