What is the difference between nan, NaN and NAN

Question

In numpy there are nan , nan and nan . What is the feeling of having all three, are they different or can any of them be used interchangeably?

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python numpy nan

sashkello Jul 24 '13 at 5:15

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2 answers

Different operating systems and programming languages can have different string representations of NaN:

  nan NaN NaN% NAN NaNQ NaNS qNaN sNaN 1.#SNAN 1.#QNAN -1.#IND

I think all three are just comfortable. They are the same.

 >>> np.nan nan >>> np.NaN nan >>> np.NAN nan >>>

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zhangyangyu Jul 24 '13 at 5:19

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user2357112 · Accepted Answer · 2013-07-24T05:16:58+0000

 >>> numpy.nan is numpy.NaN is numpy.NAN True

It is just convenient. They are exactly the same.