Binary Search

Binary Search follows the divide-and-conquer strategy. It’s effective when we need to find a key in a Large data set.

How: In a binary search operation the data set is divided into two parts in the first step. Then if the target value is lower then mid value, all the upper values will be ignored. It will ignore the same lower values in case of the opposite. And this procedure will keep going until there is one value. If it’s the target value then function will return its position, otherwise -1 will be returned.  By the way, the data set has to be sorted before we can apply this algorithm.

Binary Search algorithm can either be iterative, or recursive. Let’s see how they look in Java.

The recursive approach:


The iterative approach:


Author: ashiquechowdhury

A software developer, and a data science enthusiast

Leave a Reply

Please log in using one of these methods to post your comment: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s