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

3) What is the output of this program?

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

4) What is the output of this program?

class array_output
      {
         public static void main(String args[])
          {
        	    int array_variable [] = new int[10];
 	    for (int i = 0; i < 10; ++i)
 {
                 array_variable[i] = i/2;
                 array_variable[i]++;
                 System.out.print(array_variable[i] + " ");
                 i++;
             }
           }
      }

5) 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));
         }
      }