Page 209 - Computer science 868 Class 12
P. 209

18                          if(i%2==0)
                  19                          {

                  20                              s=s - (i *i);
                  21                          }
                  22                          else

                  23                          {

                  24                              s=s+(i*i);
                  25                          }
                  26                      }

                  27                      System.out.println("Sum = "+s);
                  28                      break;

                  29                  case 2: System.out.println("Enter nth terms ");
                  30                      n=sc.nextInt();

                  31                      for(i=1;i<=n;i++)
                  32                      {

                  33                          s=s*10+1;
                  34                          System.out.print(s+" , ");

                  35                      }
                  36                      break;

                  37                  default: System.out.println("Wrong Choice");
                  38              }

                  39          }
                  40      }


                 The output of the preceding program is as follows:
                 1. S = 1 - 4 + 9 - 16 + ………… to n terms

                 2. 1, 11, 111, 1111, … n
                 Enter your choice
                 1
                 Enter nth terms
                 5
                 Sum = 15














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