“Suppose you are given a matrix of integers. Your task is to write a function that returns the sum of the elements in the matrix.

Example 1:

Input:

<pre tabindex="0" class="chroma"><code>matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>matrix_sum(matrix) -&gt; 45
</code></pre>

Example 2:

Input:

<pre tabindex="0" class="chroma"><code>matrix = [[-1, -2, -3], [-4, -5, -6], [-7, -8, -9]]
</code></pre>

Output:

<pre tabindex="0" class="chroma"><code>matrix_sum(matrix) -&gt; -45
</code></pre>

The function should be able to handle both positive and negative integers and should return the sum as an integer.

The task is to find the sum of all elements in a given matrix of integers.

Sum of Matrix Elements

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