CODEWITHSUNDEEP
pythonfloating-pointmaxlong-integer
ladyfafa
ladyfafa

Reputation: 7269

What is the maximum float in Python?

The maximum integer in Python 2 is available by calling sys.maxint.

What is the maximum float or long in Python?

See also: Maximum and Minimum values for ints.

Upvotes: 246

Views: 365922

Answers (4)

David Webb
David Webb

Reputation: 193696

For float have a look at sys.float_info:

>>> import sys
>>> sys.float_info
sys.float_info(max=1.7976931348623157e+308, max_exp=1024, max_10_exp=308, 
min=2.2250738585072014e-308, min_exp=-1021, min_10_exp=-307, dig=15, mant_dig=53, 
epsilon=2.220446049250313e-16, radix=2, rounds=1)

Specifically, sys.float_info.max:

>>> sys.float_info.max
1.7976931348623157e+308

If that's not big enough, there's always positive infinity:

>>> infinity = float("inf")
>>> infinity
inf
>>> infinity / 10000
inf

int has unlimited precision, so it's only limited by available memory.

Upvotes: 365

GWW
GWW

Reputation: 44093

sys.maxsize (previously sys.maxint) is not the largest integer supported by python. It's the largest integer supported by python's regular integer type.

Upvotes: 18

Holger Bille
Holger Bille

Reputation: 2551

In python 3 there is no sys.maxint There is a sys.maxsize

>>> sys.maxsize
2147483647

That does not mean that the maximum int is limited to 2 billion! It means that the size of the object containing the integer has a maximum size of 2 billion bytes. I.e. a very very large number

For float have a look at sys.float_info

>>> sys.float_info
sys.float_info(max=1.7976931348623157e+308, max_exp=1024, max_10_exp=308, min=2.2250738585072014e-308, min_exp=-1021, min_10_exp=-307, dig=15, mant_dig=53, epsilon=2.220446049250313e-16, radix=2, rounds=1)

And specifically sys.float_info.max

>>> sys.float_info.max
1.7976931348623157e+308

Upvotes: 3

The Aelfinn
The Aelfinn

Reputation: 16908

If you are using numpy, you can use dtype 'float128' and get a max float of 10e+4931

>>> np.finfo(np.float128)
finfo(resolution=1e-18, min=-1.18973149536e+4932, max=1.18973149536e+4932, dtype=float128)

Upvotes: 13

Related Questions