public static double ulp (double d)

Returns the size of an ulp of the argument. An ulp, unit in the last place, of a double value is the positive distance between this floating-point value and the double value next larger in magnitude. Note that for non-NaN x, ulp(-x) == ulp(x).

Special Cases:

• If the argument is NaN, then the result is NaN.
• If the argument is positive or negative infinity, then the result is positive infinity.
• If the argument is positive or negative zero, then the result is Double.MIN_VALUE.
• If the argument is ± Double.MAX_VALUE, then the result is equal to 2⁹⁷¹.

Parameters:

d

the floating-point value whose ulp is to be returned

Returns:  the size of an ulp of the argument

Since:  1.5