Why is there an error when splitting 2 / 5.0 in Python?

Question

Possible duplicate:
Python float - str-float weirdness

In python 2/5.0or 2/float(5)returns0.40000000000000002

Why am I getting this error at the end and how can I get the correct value for use in advanced calculations?

Answer 1

Welcome to IEEE754, enjoy your stay .

Use instead decimal.

Answer 2

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Answer 3

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Answer 4

, Python 3.1 , . . Python 3.1 ( " " ).

Answer 5

See this question for an explanation. The right way is either

• Use integers until final calculation
• Live with rounding errors.