# Transpose a Matrix

Easy

12

62.7% Acceptance

In this lab, you will implement a function to transpose a given 2D integer array `matrix`

. The transpose of a matrix is the matrix flipped over its main diagonal, switching the matrix's row and column indices.

**Example 1:**

Input: matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

Output: [[1, 4, 7], [2, 5, 8], [3, 6, 9]]

**Example 2:**

Input: matrix = [[1, 2, 3], [4, 5, 6]]

Output: [[1, 4], [2, 5], [3, 6]]

**Example 3:**

Input: matrix = [[1, 4, 7], [2, 5, 8], [3, 6, 9]]

Output: [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

**Constraints:**

`m == matrix.length`

`n == matrix[i].length`

`1 <= m, n <= 1000`

`1 <= m * n <= 105`

`-109 <= matrix[i][j] <= 109`

In this lab, you will export a function `transpose(matrix: number[][]): number[][]`

. We have already initialized a file `index.js`

for you. In the following sections, you'll find different challenges.

## Challenges

- Write the
`transpose`

function that takes a 2D integer array`matrix`

and returns the transpose of the input matrix. - Export the
`transpose`

function using ESM export.