Number Types: Floating-point Types

• Rounding errors occur when an exact conversion between numbers is not possible
  double f = 4.35;
  System.out.println(100 * f); // prints 434.99999999999994
• Java: Illegal to assign a floating-point expression to an integer variable
  double balance = 13.75;
  int dollars = balance; // Error
• Casts: used to convert a value to a different type
  int dollars = (int) balance; // OK
  Cast discards fractional part.
• Math.round converts a floating-point number to nearest integer
  long rounded = Math.round(balance); // if balance is 13.75, then
                                      // rounded is set to 14