[Solved] What is the output of the following code?import numpy as np arr = np.array([1, 2, 3]) result = arr * 3 print(result) | NumPy

NumPy - Broadcasting

What is the output of the following code?

import numpy as np
arr = np.array([1, 2, 3])
result = arr * 3
print(result)

A[3 3 3]

B[1 2 3 3 6 9]

CError due to shape mismatch

D[3 6 9]

Step-by-Step Solution

Solution:

Step 1: Understand scalar multiplication with array
Multiplying an array by a scalar multiplies each element by that scalar.
Step 2: Calculate element-wise multiplication
Each element in [1, 2, 3] is multiplied by 3, resulting in [3, 6, 9].
Final Answer:
[3 6 9] -> Option D
Quick Check:
Array * scalar = element-wise multiplication [OK]

Quick Trick: Multiply each element by scalar directly [OK]

Common Mistakes:

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