scanner input, double do while loop

Question

I need some help with using a do while loop for an input with scanner. When the incorrect value is entered, I want an error message to display and then be forced to re enter a value. At the moment it shows the error message but continues to proceed onwards.

double price;
do { 
  System.out.print("What is the price of " + name + "? ");
  price = (double) input.nextDouble();
  if (price <= 0) {
    System.out.println("Error - burgers must be over $0");
  }
} while (price < 0);
input.nextLine(); // flush input line

Answer 1

Just chage the do-while condition form

while (price < 0);

to

 while (price <= 0);

as your current while condition is only chekcing for values less than 0.