Page 191 - CA_Blue( J )_Class9
P. 191

case 1:     System.out.println("Sum " + (a+b));
                                  break;
                      case 2:     System.out.println("Difference " +(a-b));
                                  break;
                      default :  System.out.println("Product " +(a*b));
                      }
                    4.   Rewrite the following program segment using the if..else statement:
                       comm = (sale > 15000)? sale * 5 / 100 : 0;
                   Ans.   if(sale > 15000)
                            comm = sale * 5 / 100;
                            else
                        comm = 0;
                    5.   Find the error and correct them:
                     if(a==1)
                            System.out.println("A is one");
                     Else if(b==2);
                            {
                            system.out.println("B is two");
                     else
                            System.out.println("C is three");
                   Ans.   if(a==1)
                            System.out.println("A is one");
                     else if(b==2)
                     {
                     System.out.println("B is two");
                     }
                     else
                     System.out.println("C is three");
                    6.   Evaluate the value of n if value of p = 5, q = 19.
                       int n = (q - p) > (p - q)? (q - p) : (p - q);
                   Ans.   14 [Explanation: n = (19 – 5)>(5-19) = 14>-14 which is true.]


                      Unsolved Questions


                 A.  Tick ( ) the correct answer.
                    1.  Is it necessary to enclose the code block of an if statement within braces { }?
                        a. Yes, always
                        b. No, only if there is more than one line of code in the block
                        c. No, braces are never required
                        d. Yes, but only for if-else statements
                    2.  In Java, if statement is a ………………… statement.
                        a.  Boolean                                    b.  Conditional
                        c.  Iterative                                  d.  Optional
                    3.  Choose the correct syntax of Java if statement below:
                        a.  if(condition)
                          //statement;
                        b.  if(condition);
                            {
                             //statement;
                            }



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