[Solved] What will this code print?import numpy as np arr = np.array([[1, 2], [3, 4]]) print(np.sum(arr, axis=0)) | NumPy

NumPy - Aggregation Functions

What will this code print?

import numpy as np
arr = np.array([[1, 2], [3, 4]])
print(np.sum(arr, axis=0))

A[3 7]

B[1 2 3 4]

C[4 6]

D10

Step-by-Step Solution

Solution:

Step 1: Understand np.sum with axis=0
Summing along axis=0 adds elements column-wise.
Step 2: Calculate column sums
First column: 1+3=4; second column: 2+4=6; result is [4 6].
Final Answer:
[4 6] -> Option C
Quick Check:
Sum axis=0 = column sums [OK]

Quick Trick: axis=0 sums columns, axis=1 sums rows [OK]

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