[Solved] What will be the output of this code?import numpy as np arr = np.array([0, 1, 2, 3]) print(arr.astype(bool)) | NumPy

NumPy - Array Data Types

What will be the output of this code?

import numpy as np
arr = np.array([0, 1, 2, 3])
print(arr.astype(bool))

A[True True True True]

B[False True True True]

C[False False False False]

D[0 1 2 3]

Step-by-Step Solution

Solution:

Step 1: Understand int to bool conversion
In NumPy, 0 converts to False, and any non-zero integer converts to True when cast to bool.
Step 2: Convert each element
0 becomes False, 1, 2, 3 become True, so output is [False True True True].
Final Answer:
[False True True True] -> Option B
Quick Check:
astype(bool) converts 0 to False, others True [OK]

Quick Trick: astype(bool) treats 0 as False, others True [OK]

Common Mistakes:

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