Sum 2D array in Python using map() function

In this tutorial, we are going to find the sum of a 2D array using map function in Python.

The map function takes two arguments i.e., function and iterable. It passes every element of the iterable to the function and stores the result in map object. We can covert the map object into an iterable.

Let's see how to find the sum of the 2D array using the map function.

• Initialize the 2D array using lists.

• Pass the function sum and 2D array to the map function.

• Find the sum of resultant map object and print it.

Example

See the code below.

 Live Demo

# initializing the 2D array
array = [
   [1, 2, 3],
   [4, 5, 6],
   [7, 8, 9]
]
# passing the sum, array to function
result = list(map(sum, array))
# see the result values
# it contains sum of every sub array
print(result)

Output

If you run the above code, you will get the following output.

[6, 15, 24]

Output

Now, find the sum of the result using the same sum function.

# finding the sum of result
print(sum(result))

Output

If you add the above code snippet the above program and run it, you will get the following output.

45

Conclusion

If you have any doubts in the tutorial, mention them in the comment section.

Hafeezul Kareem

Published on 12-Feb-2020 12:52:53

• Related Questions & Answers
• Convert 2D array to object using map or reduce in JavaScript
• Prefix sum array in python using accumulate function
• Prefix sum array in python using the accumulate function
• Map function and Dictionary in Python to sum ASCII values
• Prefix Sum of Matrix (Or 2D Array) in C++
• Passing a 2D array to a C++ function
• sum() function in Python
• Flatten a 2d numpy array into 1d array in Python
• How to use my object like an array using map function in JavaScript?
• Map Sum Pairs in JavaScript
• How to store a 2d Array in another 2d Array in java?
• Peak Element in 2D array
• Maximum sum rectangle in a 2D matrix
• Range Sum Query 2D - Immutable in C++
• Range Sum Query 2D - Mutable in C++