Python – erf() Function – Examples & Explanation

`erf()` function is used to find the can be used to compute traditional statistical functions such as the cumulative standard normal distribution in Python for the given input(x – parameter).

Syntax of `erf()` Function

The syntax of `erf()` function in Python is:

```math.erf(x)
```

Parameters of `erf()` Function in Python

`x` – Where `x` is any valid python number (positive or negative). This parameter is required.
Note: If the `x` parameter is not a number, `erf()` function will return an ```Error. ```

Compatibility

`erf()` function is available and compatible with both Python `2.x` and `3.x`. This function is a part of python standard math library.

Return Value of `erf()` Function in Python

`erf()` function returns can be used to compute traditional statistical functions such as the cumulative standard normal distribution for the given input.

Python `erf()` Function Example

```# import math library
import math
print(math.erf(-0.2))
print(math.erf(0))
print(math.erf(0.2))
print(math.erf(77))
print(math.erf(-3677))
```

Output:

`-0.22270258921047842`
`0.0`
`0.22270258921047842`
`1.0`
`-1.0`