Find all indexes of an element in an array using recursion

In this video tutorial, we will learn how to find all the indices of a specific element in an array. Let's say we have an array with elements: [5, 3, 2, 10, 3, 15]. If we search for the element 3 in the array, we find that it is present at two indices: 1 and 4. Our goal is to find all such indices.

The array indices start from 0, meaning the indices are [0, 1, 2, 3, 4, 5]. We will create a recursive function that can locate and collect these indices. The function will start from index 0 and incrementally move through the array to collect all matching indices.

Our hypothesis will be that if we have a data element to search for, each recursive step will check the current index and move to the next until the element is found. If a match is found, we add that index to a list, and at the end, the function will return the entire list.

Thus, our recursive function find_all_indices will traverse the array and return all indices where the element is found.

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