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 Output
      {
         public static void main(String args[])
          {
                  int a = 1;
              int b = 2;
              int c;
              int d;
              c = ++b;
              d = a++;
              c++;
              b++;
              ++a;
              System.out.println(a + " " + b + " " + c);
         }
      }

3) 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++;
             }
           }
      }

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[])
          {
             char a = 'A';
             a++;
 	    System.out.print((int)a);
         }
      }