import type { array, matrix } from "../types";
/**
 * Get a row of a matrix.
 *
 * Retrieves a specific row from a 2D matrix. If the input is not a matrix or if the row index is invalid, an error is thrown.
 *
 * @param x The input matrix (2D array) from which to retrieve the row.
 * @param n The row index to retrieve (0-based index).
 * @returns An array representing the specified row of the matrix.

 * @throws Throws an error if the input is not a matrix or if the row index is out of bounds.
 *
 * @example Get the first row
 * ```ts
 * import { assertEquals, assertThrows } from "jsr:@std/assert";
 *
 * assertEquals(getrow([[5, 6, 5], [7, 8, -1]], 0), [5, 6, 5]); // [5, 6, 5]
 *
 * ```
 *
 * @example Get the second row
 * ```ts
 * import { assertEquals, assertThrows } from "jsr:@std/assert";
 *
 * assertEquals(getrow([[5, 6, 5], [7, 8, -1]], 1), [7, 8, -1]); // [7, 8, -1]
 *
 * ```
 *
 * @example Invalid row index (out of bounds)
 * ```ts
 * import { assertEquals, assertThrows } from "jsr:@std/assert";
 *
 * assertThrows(() => { getrow([[5, 6, 5], [7, 8, -1]], 2); }, Error, 'Row index must be an integer between 0 and N - 1 rows');
 *
 * ```
 */
export default function getrow(x: matrix, n: number): array;
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