# Python isfinite() Function Example | Python Math Methods

Python isfinite() is an inbuilt method that is used to find whether a number is finite or not. It accepts a number (integer, float, NaN ) and checks whether it is finite or not.

Python isfinite() is an inbuilt method that is used to find whether a number is finite or not. It accepts a number (integer, float, NaN ) and checks whether it is finite or not. The infinite() function is under python math library, so we have to import math if we want to use the infinite() function.

### Python isfinite()

Python isfinite() function exists in the  Standard math library of Python language. It is used to determine whether the particular python number is a finite number or not.

#### Syntax

``math.isfinite(x)``

The isfinite() function takes x as an argument and checks if x is finite or not. Here x can be an integer, float, double, inf, NaN, etc.

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