What is the range of datatype double in Matlab ?

If we assign any value to a variable , Matlab assigns its data type as double .

What is the max range of that variable ?

Answer 1

[David Sanchez]

All numerical variables in MATLAB are stored as 32 bit floating point numbers. This corresponds to double precision on most computers. I think it can range from -1.7976931348623158e+308 to -2.2250738585072014e-308, or from 2.2250738585072014e-308 to 1.7976931348623158e+308.

[Laurent]

This range is correct, although a double requires 64 bits to store its value.

[James Tursa]

To clarify the lower range, numbers between these two number ranges are "de-normalized" or "sub-normal", meaning they have less precision (using fewer actual mantissa bits) than a regular double.

>> typecast(uint64(1),'double')
ans =
    4.940656458412465e-324
>> realmin
ans =
    2.225073858507201e-308

Whereas numbers between these two ranges have full precision (use all available mantissa bits):

>> realmin
ans =
    2.225073858507201e-308
>> realmax
ans =
    1.797693134862316e+308

Similar for negative numbers.