# How to Solve 2D Array Questions in Python?

Solving 2D array questions in Python involves using nested loops and other programming constructs to manipulate the elements of a 2D array. Here’s an example of how to solve a 2D array question in Python:

Problem: Given a 2D array of integers, write a function to find the sum of all the elements in the array.

Solution:

``````def sum_2d_array(arr):
# Initialize the sum variable
total_sum = 0

# Loop over the rows and columns of the array
for row in range(len(arr)):
for col in range(len(arr[row])):
# Add the current element to the sum
total_sum += arr[row][col]

# Test the function with a sample 2D array
arr = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
total_sum = sum_2d_array(arr)
print("The sum of all elements in the array is:", total_sum)``````

In this example, we define a function `sum_2d_array` that takes in a 2D array `arr` and returns the sum of all the elements in the array.

We initialize the `total_sum` variable to 0.

We loop over the rows and columns of the array using nested for loops. For each element of the array, we add its value to the `total_sum` variable.

Finally, we return the `total_sum` variable.

We test the function with a sample 2D array `arr = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]`, and print the sum of all the elements in the array.

Note: This is just one example of how to solve a 2D array question in Python. There are many other types of 2D array questions that can be solved using different programming techniques.