Exercise 3: Sum the Rows of a Matrix
Write code that calculates the array produced by summing the entries of each row of a matrix.
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In this exercise, you’re given a nested array. Sum the entries in each row of the matrix and return an array containing these sums.
For example, consider the following array:
nested_array = [ [1, 2, 3], [4, 5, 6], [7, 8, 9] ]
We get the following output in return:
[6, 15, 24]
Try it yourself
def sum_the_cols(nested_array)result = # Start your code herereturn resultend