Grokking the Art of Recursion for Coding Interviews
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9. Binary Search
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Problem Statement

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Problem Statement

Write Recursive Approach to Implement Binary Search Algorithm.

The problem is to implement the binary search algorithm using recursion. Given a sorted array and a target key, the algorithm should determine whether the key is present in the array or not.

Examples

Sr #ArrayInput KeyOutput
1[1, 2, 3, 4, 5]4True
2[2, 4, 6, 8, 10]5False
3[3, 6, 9, 12, 15]15True

Constraints:

  • 1 <= nums.length <= 10<sup>4</sup>
  • -10<sup>4</sup> < nums[i], target < 10<sup>4</sup>
  • All the integers in nums are unique.
  • nums is sorted in ascending order.

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Try solving this question here:

Python3
Python3
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On this page

Problem Statement

Examples

Try it yourself