CODEWITHSUNDEEP
python
Peter
Peter

Reputation: 564

Convert very large value into FLOAT in python

Im stuck on how to write a function which get as an input ether

and transform into a float.

The problem is when I transform into a FLOAT, it is missing characters.

#value= int(45264444.4444444444466666254188888888888526)
value= "45264444.4444444444466666254188888888888526"

float(value)

output:45264444.44444445

Upvotes: 1

Views: 380

Answers (1)

Gassa
Gassa

Reputation: 8846

A float can not store arbitrary numbers, its precision is limited. A float will store the few most significant digits of a number (in binary form), and discard the rest. That is why you see the value truncated.

For a more in-depth look at the problem, see for example https://0.30000000000000004.com/, or some general guide on floating-point arithmetic.

Upvotes: 1

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