# numpy.polyval() Method with Example

Python | numpy.polyval(): Learn about the numpy.polyval() method, its usages and example. By Pranit Sharma Last updated : December 24, 2023

NumPy is an abbreviated form of Numerical Python. It is used for different types of scientific operations in python. Numpy is a vast library in python which is used for almost every kind of scientific or mathematical operation. It is itself an array which is a collection of various methods and functions for processing the arrays.

## Python numpy.polyval() Method

A mathematical expression generally composed of more than one variable where the degree of the variable is usually a whole number is said to be a polynomial.

It takes an array like input p which is the polynomial coefficient. It takes another array like parameter x which can be a number or an array of numbers at which to evaluate the p. If p is of length N.

## Syntax

```numpy.polyval(p, x)
```

## Parameter(s)

• p: polynomial coefficients
• x: specific point/points at which to evaluate p.

## Return Value

The polyval() method returns the values in terms of p, x, and N.

Let us understand with the help of an example,

## Python code to demonstrate the example of numpy.polyval() method

```import numpy as np

# Using numpy.polyval
res = np.polyval([3,0,1], 5)

# Display result
print("Result:\n",res)
```