Binary Search Tutorial for Beginners | Binary Search Questions Solved Data Structures and Algorithms

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What is Binary Search?

Binary search is an efficient algorithm for finding an item from a sorted list of items. It works by repeatedly dividing in half the portion of the list that could contain the item until you have narrowed down the possible locations to just one.

In its simplest form, binary search is used to quickly find a value in a sorted sequence (consider a sequence an ordinary array for now). We'll call the sought value the target value for clarity. Binary search maintains a contiguous subsequence of the starting sequence where the target value is surely located.

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