w3resource

Python Math: Generate a square matrix filled with elements from 1 to n raised to the power of 2 in spiral order

Python Math: Exercise-73 with Solution

Write a Python program to generate (given an integer n) a square matrix filled with elements from 1 to n raised to the power of 2 in spiral order.

Sample Solution:

Python Code:

#https://gist.github.com/Ray1988/6806c1b85af70388a277
def generateMatrix(n):
        if n<=0:
            return [] 

        matrix=[row[:] for row in [[0]*n]*n]
        
        row_st=0
        row_ed=n-1
        
        col_st=0
        col_ed=n-1
        current=1
        
        while (True):
            if current>n*n:
                break
            for c in range (col_st, col_ed+1):
                matrix[row_st][c]=current
                current+=1
            row_st+=1
            for r in range (row_st, row_ed+1):
                matrix[r][col_ed]=current
                current+=1
            col_ed-=1
            for c in range (col_ed, col_st-1, -1):
                matrix[row_ed][c]=current
                current+=1
            row_ed-=1
            for r in range (row_ed, row_st-1, -1):
                matrix[r][col_st]=current
                current+=1
            col_st+=1
        return matrix

print(list(generateMatrix(3)))

Sample Output:

[[1, 2, 3], [8, 9, 4], [7, 6, 5]] 

Pictorial Presentation:

Python Math: Generate a square matrix filled with elements from 1 to n raised to the power of 2 in spiral order

Flowchart:

Flowchart: Generate a square matrix filled with elements from 1 to n raised to the power of 2 in spiral order

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program to create a range for floating numbers.
Next: Write a Python program to select a random date in the current year.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Become a Patron!

Follow us on Facebook and Twitter for latest update.

It will be nice if you may share this link in any developer community or anywhere else, from where other developers may find this content. Thanks.

https://www.w3resource.com/python-exercises/math/python-math-exercise-73.php