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function printColumnOfMatrix(matrix, col) { const rows = matrix.length; for (let i = 0; i < rows; i++) { console.log(matrix[i][col]); } } const matrix = [ [3, 2, 5, 1], [4, 7, 6, 5], [9, 3, 0, 1] ]; printColumnOfMatrix(matrix, 2); /* run: 5 6 0 */