August 10, 2026 - import math print(math.isnan(1)) print(math.isnan(0.00)) print(math.isnan(-2)) print(math.isnan(-4.0002)) print(math.isnan(math.pi)) ... In this Mathematical function example, we are using the infinity, math.inf, not a number values as the method ...

September 4, 2024 - In the example below, math.isnan() returns True because the variable nan, created using float, represents a “Not a Number” (NaN) value: ... Looking for an introduction to the theory behind programming? Master Python while learning data structures, algorithms, and more!

March 8, 2024 - # Python Program illustrating # numpy.isnan() method import numpy as geek # Returns True/False value for each element b = geek.arange(20).reshape(5, 4) print("\n",b) print("\nIs NaN(Not a Number): \n", geek.isnan(b)) b = [[1j], [geek.nan]] ...

February 20, 2023 - # Python3 code to demonstrate # the working of isnan() import math # initializing the value test_int = 4 test_neg_int = -3 test_float = 0.00 # checking isnan() values # with different numbers print (math.isnan(test_int)) print (math.isnan(t...

Python Examples Python Compiler Python Exercises Python Quiz Python Challenges Python Practice Problems Python Server Python Syllabus Python Study Plan Python Interview Q&A Python Training ... # Import math Library import math # Check whether some values are NaN or not print (math.isnan (56)) print (math.isnan (-45.34)) print (math.isnan (+45.34)) print (math.isnan (math.inf)) print (math.isnan (float("nan"))) print (math.isnan (float("inf"))) print (math.isnan (float("-inf"))) print (math.isnan (math.nan)) Try it Yourself »

import math x = math.nan result = math.isnan(x) print('isnan(x) :', result)

Example: Input: a = 10 b = float('inf') c = float('nan') # function call print(math.isnan(a)) print(math.isnan(b)) print(math.isnan(c)) Output: False False True · # python code to demonstrate example of # math.isnan() method # importing math module import math # math.isnan() method test on ...

February 12, 2020 - The math module of Python contains the definition for math.isnan () function. This function returns boolean values that are either true or false. It returns True if the parameter is not a number otherwise it returns false for a valid number which could be positive or negative. We need to import the math module to implement the isnan() method.

February 9, 2025 - Here’s how: import numpy as np # Example array with NaN values arr = np.array([1, 2, np.nan, 4, np.nan, 6]) # Replace NaN values with a specific number, e.g., 0 arr_cleaned = np.where(np.isnan(arr), 0, arr) print("Array after replacing NaN ...

February 15, 2024 - import math # Assuming my_number is a float or can be converted to one my_number = float('nan') print(math.isnan(my_number)) # Output: TruePowered by · Learn-by-Example editor, press Tab to Enter. Press Escape and then Tab or Shift+Tab to navigate out. ... Identifying and managing NaN values is a fundamental step in cleaning and preparing your data for analysis. Whether you're working with arrays, series, or data frames, understanding the tools and methods available in Python to deal with missing data is essential.

July 23, 2025 - # code import numpy as np # Example array array = np.array([1, 2, np.nan, 4, 5]) # Check for NaN values nan_check = np.isnan(array) print(nan_check)

The math module in Python provides the isnan() function, which can be used to check if a value is NaN. This method works only with floating-point values. Here's an example:

import math x = float('nan') result = math.isnan(x) print("The result is:",result) ... In this example, we are checking if the integer number "100" is NaN using the math.isnan() method −

May 2, 2026 - NumPy.isnan() method Example-3: >>> import numpy as np >>> np.isnan([np.log(-2.),2.,np.log(0)]) Output: array([ True, False, False]) Python - NumPy Code Editor: PREV : isinf() function NEXT : isnat() function  · Follow us on Facebook and Twitter for latest update.

Examples · Try it in your browser! >>> import numpy as np >>> np.isnan(np.nan) True >>> np.isnan(np.inf) False >>> np.isnan([np.log(-1.),1.,np.log(0)]) array([ True, False, False]) Go BackOpen In Tab ·

numpy.isnan(x, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature, extobj]) = <ufunc 'isnan'>

March 8, 2024 - # Python Program illustrating # numpy.isnan() method import numpy as geek # Returns True/False value for each element b = geek.arange(20).reshape(5, 4) print("\n",b) print("\nIs NaN(Not a Number): \n", geek.isnan(b)) b = [[1j], [geek.nan]] ...

October 27, 2025 - Python’s numpy.isnan() takes an array as input and does an element-wise check for NaN values and returns the results as a boolean array highlighting the locations where an NaN was found.

September 22, 2023 - There are many ways to check for NaN values in Python, and we'll cover some of the most common methods used in different libraries. Let's start with the built-in math library. The math.isnan() function is an easy way to check if a value is NaN. This function returns True if the value is NaN and False otherwise. Here's a simple example: