Numpy isinf() function tests if an element is a positive or negative infinity. The isinf() function takes two parameters, out of which one is optional.

Numpy isinf() function **tests if an element is a positive or negative infinity.** The isinf() function takes two parameters, out of which one is optional. We can pass the arrays also to check whether the items present in the array belong to a +ve infinity or -ve class. If it is not +ve or -ve infinity, the method returns **False** otherwise **True**. So, the isinf() function returns Boolean values.

The** numpy isinf()** function is used to test element-wise for positive or negative infinity. Returns a boolean array of the same shape as x, True where x == +/-inf, otherwise False. The isinf() function is defined under the numpy library, which can be imported as import numpy as np, and we can create a multidimensional array and derive other mathematical statistics with a help of numpy, which is a library in Python.

`numpy.isinf(array or the scalar value, out(output array))`

The second parameter is optional.

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