![]() ![]() This is because the break statement was missing. Notice also that, even though the input value “Premium” did not match the “Basic plus” and “Basic” cases, the statements from these cases were executed anyway. The program entered from the “Premium” case. Notice here that the println statement of the “Premium plus” case was not executed as the program did not enter the switch statement in this case. ![]() Let us run our program and check the results. ("Your hosting plan includes:") Ĭase "Premium plus": ("- Extra 1 CPU") Ĭase "Premium": ("- Extra 1GB RAM") Ĭase "Basic plus": ("- Unlimited bandwidth") Ĭase "Basic": ("- 2 Domain names") Since we can ristrict the entry point using the “case” keyword, we can write our program in a way that includes all the correct features by simply defining the switch case order from the most inclusive case to the least inclusive. Now, let us model this program in Java using a switch statement. The plan includes whatever is in the “Premium”, the “Basic plus” and the “Basic”, plus an extra 1 CPU. And finally, there comes the “ Premium plus” plan.Then comes the “ Premium” plan which includes whatever is in “Basic plus” and “Basic”, plus an extra 1GB of RAM.Then there is a “ Basic plus” plan, which includes whatever is in the “Basic” plan plus unlimited bandwidth.Our plans start with a “ Basic” package with 2 free domain names.The following program is used to print out the features a customer would get when they choose a hosting plan from our imaginary web hosting provider. If X is equal to 3, then the code from case 3 is executed and the switch statement is terminated. If X is equal to 2, then only the code from case 2 is executed. The program stops at case 2 because there is a break keyword there. Using this setup, if X is equal to 1, then the code from case 1 and 2 is executed. ![]() This diagram illustrates a switch statement where case 1 and case 3 do not have the break keywords. So what if we did not have a break keyword? Then the program will continue execution until either a break statement is encountered or the end of the switch statement is reached. In our previous program, only one statement was executed, since after each case, a break keyword was present. Since there is a break after each case, only the code related to the single matching case is executed. This diagram illustrates a switch statement with a break after each case. Since the code of every case is followed by a “break”, only that code will be executed. Similarly, if the break keyword is encountered inside a switch statement, it will prompt Java to exit the while switch statement. For example, if it is inside a “while” loop, the program will skip the execution of the loop and will exit the loop’s scope. The break keyword is a java keyword that allows the execution to exit from its current conditional scope. Let us discuss this in more details in the next section. However, if it is missing, the program will not exit the switch statement and will continue executing until either a break statement is found, or we exit the program. It is not mandatory to have the break keyword in each case. As you can see in our example, since we used the value “B”, we started the execution from the “case B” part of the switch statement.īreak: The “break” keyword signals the program to exit the switch statement. The entry point can be entered if the input value to the switch statement matches the one in the case. Each case is defined for a specific value. The switch statement takes a single input value to be evaluated.Ĭase: The “case” keyword” signifies an entry point for execution. Switch: This signifies the start of a switch statement. Let us go over some keywords in that example: When running this program, we will get the following output. The switch statement is fed the character value “grade”, and one of the paths will be executed depending on the value of grade.Ĭase 'Á': ("Excellent!") break Ĭase 'B': ("Very good!") break Ĭase 'C': ("Average!") break Ĭase 'D': ("Poor!") break Ĭase 'E': ("Very poor!") break Ĭase 'F': ("Failed") break ![]() The following is an example of a switch statement. A person calls the switch board staff and asks to be routed to a specific number, and the operator on the switch board will connect your call to a specific routing port, depending on the number you as for. The path that is taken will depend upon an input value provided to the switch statement.Īn analogy can be drawn from the good old days with a telephone switch board. Inside a switch statement, multiple execution paths are defined. 8 Related Posts What is a “ switch” statementĪ “switch” statement in Java is a conditional operator used to direct the execution of an algorithm to a specific code path. ![]()
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