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Effortlessly Use nxn Matrix in Python 3


Python Tutorial: Creating an NxN Matrix in Python 3

In this Python tutorial, we will learn how to create an NxN matrix using Python 3. We will provide detailed, step-by-step instructions, along with executable sample codes and explanations to help you understand the process.


Before we begin, make sure you have Python 3 installed on your system. You can install it from the official Python website ( if you haven’t done so already.

Step 1: Understanding the Problem

To create an NxN matrix, we need to define the size of the matrix, N. The user will input the value of N, and our program will generate the matrix with N rows and N columns.

Step 2: Writing the Code

Let’s start by importing the necessary module and defining the function to create the NxN matrix.

import numpy as np
def create_matrix(N):
matrix = np.zeros((N, N), dtype=int)
return matrix

In this code snippet, we import the numpy module and define the create_matrix function, which takes the size N as an input parameter. Inside the function, we use the numpy.zeros function to create an NxN matrix filled with zeros, and specify the data type as int.

Step 3: Testing the Code

To test our code, we can call the create_matrix function and provide a value for N. Let’s say we want to create a 3x3 matrix. We can call the function like this:

matrix = create_matrix(3)

The output will be:

[[0 0 0]
[0 0 0]
[0 0 0]]

As you can see, the code successfully creates a 3x3 matrix filled with zeros.

Step 4: Adding Custom Values

If you want to create a matrix with custom values, you can modify the code to provide the desired values during matrix creation. Here’s an example:

import numpy as np
def create_matrix(N):
matrix = np.zeros((N, N), dtype=int)
for i in range(N):
for j in range(N):
matrix[i][j] = int(input(f"Enter the value for element ({i+1},{j+1}): "))
return matrix

In this modified code snippet, we add a loop to iterate over each element of the matrix and prompt the user to enter a value. This way, the user can input custom values for each element.

Step 5: Conclusion

In this tutorial, we have learned how to create an NxN matrix in Python 3. We provided detailed, step-by-step instructions and included executable sample codes to guide you through the process. You can now generate NxN matrices of any size, with either default values or custom values for each element.

Remember, practice is the key to mastering any programming concept. Try experimenting with different matrix sizes and values to deepen your understanding. Happy coding!