In my data, some values are **NaN** and my code fails because of those values. How can I check NaN values in the data?

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There are functions in *NumPy, math, and pandas* libraries that you can use to check NaN values. Here is a simple example to check if a value is NaN.

>>> import math

>>> import numpy as np

>>> import pandas as pd

>>> t=float('nan')

>>> t

nan

>>>math.isnan(t)

True

>>>pd.isna(t)

True

>>>np.isnan(t)

True

>>> b=0.1

>>> np.isnan(b)

False

>>> math.isnan(b)

False

>>> pd.isna(b)

False