Java: Range of a double
A double is a 64-bit IEEE 754 floating point.
Min value (inclusive) and max value (inclusive):
−1.7976931348623157×10308
⋯
1.7976931348623157×10308
⋯
1.7976931348623157×10308
or, equivalently
−1.111⋯1×21023 … 1.111⋯1×21023
The maximum value is available as a constant: Double.MAX_VALUE.
The minimum value is -Double.MAX_VALUE, and not Double.MIN_VALUE. For details, see Why's Double.MIN_VALUE is positive? Integer.MIN_VALUE is negative!
The constant Double.MIN_VALUE is the smallest value greater than 0, i.e. not the smallest possible value. (This constant corresponds to Epsilon in .NET.) For details, see Double.MIN_VALUE vs Double.MIN_NORMAL
See ranges of all primitive types here: Ranges of Primitive Types