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how to create 2D array in python 3.8

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how to create 2D array in python 3.8

Welcome everyone, Today we will learn how to create a two-dimensional array in python so let’s start:
How do you create a two-dimensional array in Python language?

how to create two dimensional array in python
how to create a two-dimensional array in python

There are different ways to create Numpy arrays in python:

  • Using special library functions
  • Using Numpy functions
  • Conversion from other Python structures like lists

we know that Python provides many ways to create 1-dimensional,2-dimensional lists/arrays.  so let’s start to create a 1D array of size N initialized with 1s.
learn Matplotlib for Data Visualization 

How do you declare a two-dimensional array in python language?

Method 1A)

# First method to create a 1 D array using python code
Nu = 5
arrays = [2]*Nu
print(arrays)

Output:

[2, 2, 2, 2, 2]

Method 1B)

# Second method to create a 1 D array in python
Nu = 5
arrays = [8 for i in range(Nu)]
print(arrays)

Output:

[8, 8, 8, 8, 8]

we can use the below code to define 2-dimensional arrays in the following ways.

Method 2A)

# 2D array using python code
rows, cols = (3, 3)
arrays = [[1]*cols]*rows
print(arrays)

Output:

[[1, 1, 1], [1, 1, 1], [1, 1, 1]]

Method 2B)

# second method to create 2D array in python
rows, cols = (3, 3)
arrays = [[1 for i in range(cols)] for j in range(rows)]
print(arrays)

Output:

[[1, 1, 1], [1, 1, 1], [1, 1, 1]]

Method 2C)

#Third method to create 2D array in python
rows, cols = (3, 3)
arrays=[]
for i in range(cols):
col = []
for j in range(rows):
col.append(1)
arr.append(col)
print(arrays)

Output:

[[1, 1, 1], [1, 1, 1], [1, 1, 1]]

Summary: 
In this article, we saw the how-to create a two-dimensional array in python, if about this section you have any query then please comment me

Also see : python automatic Facebook post
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how to create a two-dimensional array in python, How do you declare a two-dimensional array in python language?
If you want to learn Numpy operation in python then click on it.
Best of luck!!!

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sachin Pagar

I am Mr. Sachin pagar IT software engineer, the founder of Sach Educational Support(Pythonslearning), a Passionate Educational Blogger and Author, who love to share the informative content on educational resources. Currently looking for new job opportunity in python + Embedded software domain PAN India location. check my LinkedIn (https://www.linkedin.com/in/sachin-pagar-09109a1a0)profile

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