# What is a binary search array?

## What is a binary search array?

In computer science, binary search, also known as half-interval search, logarithmic search, or binary chop, is a search algorithm that finds the position of a target value within a sorted array. Binary search compares the target value to the middle element of the array.

## How can binary search be used in arrays?

Step 1 : Find the middle element of array. using , middle = initial_value + end_value / 2 ; Step 2 : If middle = element, return ‘element found’ and index. Step 3 : if middle > element, call the function with end_value = middle – 1 . Step 4 : if middle < element, call the function with start_value = middle + 1 .

What is binary search in Java with example?

Binary search is used to search a key element from multiple elements. Binary search is faster than linear search. In case of binary search, array elements must be in ascending order. If you have unsorted array, you can sort the array using Arrays.

Can we use binary search on unsorted array?

3 Answers. You can use binary search on only one kind of “unsorted” array – the rotated array. It can be done in O(log n) time like a typical binary search, but uses an adjusted divide and conquer approach.

### How do you call a binary search?

Binary Search: Search a sorted array by repeatedly dividing the search interval in half. Begin with an interval covering the whole array. If the value of the search key is less than the item in the middle of the interval, narrow the interval to the lower half. Otherwise, narrow it to the upper half.

### What is the disadvantage of binary search?

Binary Search Algorithm Disadvantages- It employs recursive approach which requires more stack space. Programming binary search algorithm is error prone and difficult. The interaction of binary search with memory hierarchy i.e. caching is poor.

Why is binary search faster than linear search?

Binary search is much faster than linear search for most data sets. If you look at each item in order, you may have to look at every item in the data set before you find the one you are looking for. With binary search, you eliminate half of the data with each decision.

What is the process of binary search?

Binary search begins by comparing an element in the middle of the array with the target value. If the target value matches the element, its position in the array is returned. If the target value is less than the element, the search continues in the lower half of the array. Nov 20 2019

#### How do you explain binary search?

Summary Search is a utility that enables its user to search for documents, files, and other types of data. Binary search is commonly known as a half-interval search or a logarithmic search It works by dividing the array into half on every iteration under the required element is found.

#### What is an example of binary search?

Dictonary. English contains thousands of words.

• or sports-related activity.
• Library. A library contains thousands of books.
• Page Number. This might be the most common real-life example of binary search.
• University.
• 