Scalar Multiplication of a Matrix

Problem

Multiply every element of a matrix by a given scalar value and return the resulting matrix.

Solution

def scalar_multiply(matrix: list[list[int|float]], scalar: int|float) -> list[list[int|float]]:
    return [[element * scalar for element in row] for row in matrix]

Explanation

1. Iterate over each row in the matrix.
2. For each element in the row, multiply it by the scalar.
3. Return the new matrix with scaled values.

Complexity

• Time: O(m * n)
• Space: O(m * n) for the result matrix