# Numpy isinf() Example | Np isinf Function Tutorial 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.

### Numpy isinf()

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.

#### Syntax

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

The second parameter is optional.

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