The Numpy library in Python comes with a number of built-in functions to perform common mathematical operations on arrays. In this tutorial, we will look at one such function that helps us get the element-wise square of a Numpy array with the help of some examples.

## How to get the square value in Numpy?

You can use the `numpy.square()`

function to get the square of each element in a Numpy array. Pass the array as an argument.

The following is the syntax –

numpy.square(ar)

It returns an array containing the square value of each element in the passed array.

Let’s now look at a step-by-step example of using the `numpy.square()`

function.

### Step 1 – Create a Numpy array

First, we will create a Numpy array that we will use throughout this tutorial.

import numpy as np # create numpy array ar = np.array([-2, -1, 0, 1, 2, 3]) # display the array print(ar)

Output:

[-2 -1 0 1 2 3]

Here, we used the `numpy.array()`

function to create a Numpy array containing some numbers. You can see that this array contains both positive and negative numbers (along with a 0).

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### Step 2 – Get the square using `numpy.square()`

To get the square value of each element in a Numpy array, pass the array as an argument to the `numpy.square()`

function.

Let’s get the square for the array created above.

# get the square of each element np.square(ar)

Output:

array([4, 1, 0, 1, 4, 9])

We get a Numpy array with the square value of each element in the array `ar`

.

The `numpy.square()`

function works similarly on higher-dimensional arrays. For example, let’s apply this function to a 2D array of some numbers.

# create 2D numpy array ar = np.array([[-1, -2, -3], [0, 5, 0], [1, 2, 3]]) # get the sqaure of each element np.square(ar)

Output:

array([[ 1, 4, 9], [ 0, 25, 0], [ 1, 4, 9]])

You can see that we get the square value of each element in the 2D array.

For more on the `numpy.square()`

function, refer to its documentation.

You might also be interested in –

- Numpy – Get Absolute Value of Each Element
- Get the Median of Numpy Array – (With Examples)
- Numpy – Get Standard Deviation of Array Values
- Numpy – Get Min Value in Array

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