# Python erf() Function | Math.erf() in Python Example

Python erf() is a method that is defined under the math module which is basically used to find the error function at x if x is the parameter passed.

Python erf() is an inbuilt method that is defined under the math module, which is used to find the error function at x if x is the parameter passed. For example if x is passed as a parameter in erf function (erf(x)) it returns error function. We can use a math module by importing it.

### Python erf()

Python math.erf() method will return the error at x. The error function is also known as gauss error function, and the function throws an error if any non-number is passed as a parameter.

#### Syntax

``math.erf(var)``

Here var is the variable of which error function we have to find.

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