In both the iterative and the recursive binary search, explain why the condition for halting the routine with the variable found assigned false is first > last.

What will be an ideal response?


The recursive calls are always made with a subarray starting at first and running to
mid-1, or starting at mid+1 and running to last. When the array is reduced to one
element, and you send that to a recursive call, the next call will either find that array
element is the key or it will have first > last.

Computer Science & Information Technology

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