When would a do while loop be used?

This kind of loop is most often used when the test doesn’t make any sense until the statements have been performed at least once. For most purposes, the while loop is preferable. For example, the user can be asked for a password by: String input; do { System.

Are Do while loops necessary?

Avoiding the do/while loop is a recommendation included in the C++ Core Guidelines as ES. 75, avoid do-statements.

When would you use a do while loop over a while loop?

Do-while loops can be useful when you know you want the code to run at least once (a while loop will not run at all if the condition it checks for is false beforehand, but a do-while loop will run once before it checks).

When should you use a do while loop in Java?

The Java do-while loop is used to iterate a part of the program repeatedly, until the specified condition is true. If the number of iteration is not fixed and you must have to execute the loop at least once, it is recommended to use a do-while loop. Java do-while loop is called an exit control loop.

What is the difference between while loop and Do while loop?

16 Answers. The do while loop executes the content of the loop once before checking the condition of the while. Whereas a while loop will check the condition first before executing the content.

What is the difference between while and do-while loop in Java?

The while loop in java executes one or more statements after testing the loop continuation condition at the start of each iteration. Therefore, the do-while loop guarantees one execution of the loop logic whereas the while does not. …

What is the difference between a while loop and a do-while loop?

KEY DIFFERENCES: While loop checks the condition first and then executes the statement(s), whereas do while loop will execute the statement(s) at least once, then the condition is checked. While loop statement(s) is executed zero times if the condition is false whereas do while statement is executed at least once.