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Python: Read a matrix from console and print the sum for each column

Python List: Exercise - 87 with Solution

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.

Sample Solution:

Python Code:

rows = int(input("Input rows: "))
columns = int(input("Input columns: "))
matrix = [[0]*columns for row in range(rows)]
print('Input number of elements in a row (1, 2, 3): ')
for row in range(rows):
    lines = list(map(int, input().split()))
    for column in range(columns):
        matrix[row][column] = lines[column]

sum = [0]*columns
print("sum for each column:")
for column in range(columns):
    for row in range(rows):
        sum[column] += matrix[row][column]
    print((sum[column]), ' ', end = '')

Sample Output:

Input rows:  2
Input columns:  2
Input number of elements in a row (1, 2, 3): 
 1 2
 3 4
sum for each column:
4  6 

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Python List: Read a matrix from console and print the sum for each column.

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Flowchart: Read a matrix from console and print the sum for each column.

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Previous: Write a Python program to create a 3X3 grid with numbers.
Next: 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.

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Python: Tips of the Day

Big Number Readability:

you can separate zeros with underscore (_)

print(2_000_000)
print(2_000_000 +1)

Output:

2000000
2000001