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Practice

Creating Target Value with Two-Sum - Problem Solution

In this coding challenge, you are required to write a function to find the indices of two numbers in a given integer array

that add up to a specific target value.

The function takes an integer array and a target value as inputs from the user,

and returns a list with the indices of the two numbers whose sum matches the target value.

The resulting list of indices should be sorted in ascending order.


Using a Nested For Loop​

Method 1
def solution(numbers, target):
    for i in range(len(numbers)):
        for j in range(i + 1, len(numbers)):
            if numbers[i] + numbers[j] == target:
                return [i, j]
    return []

  • The first for loop selects the first number.

  • The second for loop selects the second number.

  • If the sum of the two numbers equals the target value, the function returns a list with the two indices.


Example Usage​

Input/Output Example
result = solution([2, 7, 11, 15], 9)

print(result)  # Output: [0, 1]

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