Page 77 - TP_iPlus_V2.1_Class8
P. 77

Conditional, Looping and



                      Jump Statements


                      in Java                                                                 5










                         Learning Outcomes



                             Conditional Statements                             Looping Statements

                             Jump Statements                                    Errors in Java

                             Writing Some More Programs





                 The programs we have written till now were executed statement by statement in a top-to-bottom
                 approach. Sometimes, we need to change the order of execution for statements. We also need
                 to repeat some statements a certain number of times. Apart from these, some situations occur
                 when we need to stop the execution of any statement. Java provides three types of statements,
                 which are as follows:

                 •  Conditional Statements        •  Looping Statements             •  Jump Statements
                 Let us learn about these in detail.

                  i +  CONDITIONAL STATEMENTS

                 Conditional statements allow us to change the default flow of a program. They transfer control of
                 a program from one statement to another, depending on the condition provided. If the provided
                 condition returns true, a block of specified statements is executed. Conditional statements are
                 also known as decision-making statements.
                 There are four decision-making statements in Java as follows:
                 •  if statement

                 •  if … else statement
                 •  if … else… if statement
                 •  switch statement

                 Let‘s learn about these decision-making statements in Java.
                 The if Statement

                 The if statement is the most basic conditional statement in Java that allows us to test a condition
                 before executing a block of statements. If the provided conditional expression returns true, the
                 statements specified in the body of the if statement are executed.


                                                                                                                  75
                                                                 Conditional, Looping and Jump Statements in Java
   72   73   74   75   76   77   78   79   80   81   82