How Can I Check for NaN Values in Python?

Checking for NaN Values

NaN (not a number) is a special value in floating-point arithmetic that represents an invalid or undefined number. It can occur, for example, when a mathematical operation results in an undefined value, such as dividing by zero.

To determine if a floating-point value is NaN, you can use the math.isnan() function from the Python math module. This function takes a floating-point number as an argument and returns True if the number is NaN, and False otherwise.

Example:

import math
x = float('nan')
print(math.isnan(x))  # Output: True

In the example above, the variable x is assigned the float value NaN. The math.isnan() function is then called with x as an argument, and the result (True) is printed.

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