Returns the unbiased exponent used in the representation of a double. Special cases:

• If the argument is NaN or infinite, then the result is Double.MAX_EXPONENT + 1.
• If the argument is zero or subnormal, then the result is Double.MIN_EXPONENT -1.

Parameters:

d

a double value

Returns:  the unbiased exponent of the argument

Since:  1.6