Do While Loops

In Java there is another type of loop called a Do While loop, it is very similar to a while loop but has a requirement that it is executed at least once. Let’s have a look at the syntax:

Do While Loop

Scanner scanner = new Scanner(System.in);
do {
   System.out.print("Input: ");
   input = scanner.next().toLowerCase();
   System.out.println(input)
}
while (!input.equals("quit"));

while vs do while

• while loops - check the condition first prior to executing
• do while loops - check the condition last and execute at least once (even if the condition is false).

Note: while loops are the more common practice do while loops have some use cases however the general preference is to implement while loops where required.