Master Recursive Binary Search in JavaScript 🔍 | Step-by-Step Tutorial

here's a step-by-step guide to implementing a binary search using a recursive approach:

Define the Function: Create a function that takes the array, the target value, the starting index (left), and the ending index (right) as parameters.

Base Case: Check if the starting index is greater than the ending index. If it is, the target value is not present in the array, so return -1.

Calculate Midpoint: Compute the middle index of the current subarray using the formula mid = left + (right - left) // 2.

Check Midpoint Value:
If the element at the midpoint is the target value, return the midpoint index.
If the element at the midpoint is greater than the target value, recursively call the function on the left subarray (left to mid - 1).
If the element at the midpoint is less than the target value, recursively call the function on the right subarray (mid + 1 to right).

Return Result: The function will return the index of the target value if found or -1 if the target value is not in the array.