do
statement while (condition);
Example: Validate input
double value;
do
{
System.out.print("Please enter a positive number: ");
value = in.nextDouble();
}
while (value <= 0);
boolean done = false;
while (!done)
{
System.out.print("Please enter a positive number: ");
value = in.nextDouble();
if (value > 0) done = true;
}