## Question

Asked By – Sreevisakh

How can I assign the maximum value for a long integer to a variable, similar, for example, to C++’s `LONG_MAX`

.

**Now we will see solution for issue: Maximum value for long integer **

## Answer

## Long integers:

There is no explicitly defined limit. The amount of available address space forms a practical limit.

(Taken from this site). See the docs on Numeric Types where you’ll see that `Long integers have unlimited precision`

. In Python 2, Integers will automatically switch to longs when they grow beyond their limit:

```
>>> import sys
>>> type(sys.maxsize)
<type 'int'>
>>> type(sys.maxsize+1)
<type 'long'>
```

for integers we have

## maxint and maxsize:

The maximum value of an int can be found in Python 2.x with `sys.maxint`

. It was removed in Python 3, but `sys.maxsize`

can often be used instead. From the changelog:

The sys.maxint constant was removed, since there is no longer a limit

to the value of integers. However, sys.maxsize can be used as an

integer larger than any practical list or string index. It conforms to

the implementation’s “natural” integer size and is typically the same

as sys.maxint in previous releases on the same platform (assuming the

same build options).

and, for anyone interested in the difference (Python 2.x):

sys.maxintThe largest positive integer supported by Python’s regular

integer type. This is at least 2**31-1. The largest negative integer

is -maxint-1 — the asymmetry results from the use of 2’s complement

binary arithmetic.

sys.maxsizeThe largest positive integer supported by the platform’s

Py_ssize_t type, and thus the maximum size lists, strings, dicts, and

many other containers can have.

and for completeness, here’s the Python 3 version:

sys.maxsize

An integer giving the maximum value a variable of type Py_ssize_t can take. It’s usually 2^31 – 1 on a 32-bit platform and

2^63 – 1 on a 64-bit platform.

## floats:

There’s `float("inf")`

and `float("-inf")`

. These can be compared to other numeric types:

```
>>> import sys
>>> float("inf") > sys.maxsize
True
```

This question is answered By – keyser