PYTHON

sum all values in a matrix python

#construct the matrix
matrix = [[1, 2], [4, 3]]

#iterate over the matrix summing all elements in the row
#give those row summations into a list
#sum the list to give you the answer
ans = sum([sum(row) for row in matrix])

print(ans)
10

find sum of all elements in a matrix by python

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

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


for i in range(3):
    for j in range(3):
        print(x[i][j] + y[i][j])