Python: Read a square matrix from console and print the sum of matrix primary diagonal
Python List: Exercise - 88 with Solution
Write a Python program to read a square matrix from console and print the sum of matrix primary diagonal. Accept the size of the square matrix and elements for each column separated with a space (for every row) as input from the user.
size = int(input("Input the size of the matrix: ")) matrix = [ * size for row in range(0, size)] for x in range(0, size): line = list(map(int, input().split())) for y in range(0, size): matrix[x][y] = line[y] matrix_sum_diagonal = sum(matrix[size - i - 1][size - i - 1] for i in range(size)) print("Sum of matrix primary diagonal:") print(matrix_sum_diagonal)
Input the size of the matrix: 3 2 3 4 4 5 6 3 4 7 Sum of matrix primary diagonal: 14
Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Python Code Editor:
Have another way to solve this solution? Contribute your code (and comments) through Disqus.
Previous: Write a Python program to read a matrix from console and print the sum for each column. Accept matrix rows, columns and elements for each column separated with a space(for every row) as input from the user.
Next: Write a Python program to Zip two given lists of lists.
What is the difficulty level of this exercise?
Test your Python skills with w3resource's quiz
Python: Tips of the Day
Big Number Readability:
you can separate zeros with underscore (_)
print(2_000_000) print(2_000_000 +1)
- New Content published on w3resource:
- Scala Programming Exercises, Practice, Solution
- Python Itertools exercises
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework