Do while loop switch case java8/7/2023 ![]() In each iteration, the value of x is incremented by 10. The loop repeats while the test expression or condition evaluates to true. If the value is less than or equal to 50, the loop will keep on executing. while loop in Java may contain a single, compound, or empty statement. After that, a do while loop is used where the value of x is checked in each iteration. In this example of demonstrating the do while loop, a variable x is assigned an initial value of 10. } while (Boolean_expression) An example of using the do while loop in java ![]() When the program is run, the statements are executed from the top of the source file to the bottom. The general way of using the do while loop is: The if, else, and switch statements are used for testing conditions, the while and for statements to create cycles, and the break and continue statements to alter a loop. In the next sections, I will show you examples of using the do while and while loops, first have a look at syntax: This results in executing the block of code inside the do while loop at least once even if the condition is false at the start. I am trying to make the user be able to return to the menu which is. In the case of do while loop, the expression is evaluated at the bottom. Here is a do.while loop with switch menu. The expression is checked at the top of the while loop and this is the only difference between while and do while loops. As the condition becomes false, the while loop ends and control moves to the next line of code outside the while loop. After evaluation in each iteration, if the returned value is true, the statement will keep on executing. The expression used in the while statement must return a Boolean expression. Is there a simple way to have the switch statement continually loop until the user gives the appropriate input That is, if the user replies with a value that is not defined by the code, it will run the default case and the code ends. In Java while and do while loops, the given block of code keeps on executing as long as the condition given in while statement is true. The while/do-while loop is used to execute a block of code repeatedly while a condition is true. The switch/case statement is used to execute a block of code based on the value of a variable. Similarly, you can use the break statement with the Do-While loop as well as mentioned in the below example.Among the different types of loops available in Java, the while loop is one of those. The if/else statement is used to execute a block of code based on a condition. ![]() When the value of $j becomes 3 in the above example, it terminates the child while loop and the execution move to the parent While loop and executes it. ![]() When the value of $i becomes the 5, it terminates both the while loop.īreak statement in the Inner While loop − Example $i=1 The above example is of the outer loop break. You could also display the name of the month. First when the break is placed outer loop and second when the break is placed in the inner loop.īreak statement in the Outer While loop − Example $i=1 First, the statements inside loop execute and then the condition gets evaluated, if the condition returns true then the control gets. The switch statement evaluates its expression, then executes all statements that follow the matching case label. You can also use the break in the nested While loop, here we will take two examples of the nested loop. In the above example, the loop terminates when the value of the variable $i reaches 5 because the Break statement is executed. To use the Break with a while loop, see the example below. In a do-while loop, the body of the loop is executed at least one time, whereas in a while loop, the loop may never execute if the loop condition is false. You can use the break statement with both the While loop and the Do-While loop. ![]()
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