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 dynamic_initialization
      {
         public static void main(String args[])
          {
             double a, b;
             a = 3.0;
             b = 4.0;
 	    double c = Math.sqrt(a * a + b * b);
 	    System.out.println(c);
         }
      }

4) What is the output of this program?

class Modulus
      {
         public static void main(String args[])
          {
                  double a = 25.64;
              int  b = 25;
              a = a % 10;
              b = b % 10;
              System.out.println(a + " "  + b);
         }
      }

5) What is the output of this program?

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