[Solved] What happens when you multiply a NumPy array by a scalar value?arr = np.array([1, 2, 3])result = arr * 3What is the result? | NumPy

NumPy - Array Operations

What happens when you multiply a NumPy array by a scalar value?

arr = np.array([1, 2, 3])
result = arr * 3

What is the result?

AThe array is repeated 3 times

BEach element in the array is multiplied by 3

CThe array elements are divided by 3

DAn error occurs because scalar multiplication is not allowed

Step-by-Step Solution

Solution:

Step 1: Understand scalar multiplication on arrays
Multiplying a NumPy array by a scalar multiplies each element by that scalar.
Step 2: Apply multiplication to each element
Elements [1, 2, 3] multiplied by 3 become [3, 6, 9].
Final Answer:
Each element in the array is multiplied by 3 -> Option B
Quick Check:
Scalar multiplication = element-wise multiply [OK]

Quick Trick: Scalar * array multiplies each element individually [OK]

Common Mistakes:

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