Two Sum using Python

Two Sum is a popular problem in Leetcode. It is often asked in coding interviews from companies like FAANG. Here you need to return the indices of integers from an array whose addition equals the target value. So, if you want to learn how to solve the Two Sum problem, this article is for you. In this article, I’ll walk you through a tutorial on solving the Two Sum problem using Python.

Solving Two Sum using Python

In the Two Sum problem, you will be given an array of integers and a target value. To solve this problem, you need to return the indices of these two integers from the array whose addition equals the target value. For example, you are given an array [1, 2, 3, 4], and the target value is 3. In this situation, the output should be 0,1 because the sum of 1 at index 0 and 2 at index 2 is equal to 3.

I hope you now have understood the Two Sum problem. Now here’s how to solve this problem using the Python programming language:

def twosum(nums, target):
    length = len(nums)
    for i in range(length):
        for j in range(i + 1, length):
            if nums[i] + nums[j] == target:
                return [i, j]

n = [3, 1, 1, 2]
t = 5
print(twosum(n, t))
Output: [0, 3]

So this is how you can solve this problem using Python. You can find many more practice questions to improve your problem-solving skills using Python here.

Summary

To solve the Two Sum problem, you need to return the indices of these two integers from the array whose addition equals the target value. I hope you liked this article on how to solve the Two Sum problem using Python. Feel free to ask valuable questions in the comments section below.

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Aman Kharwal

Coder with the ♥️ of a Writer || Data Scientist | Solopreneur | Founder

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