# How do you write binary search in pseudocode?

## How do you write binary search in pseudocode?

Pseudocode

- Let min = 0 and max = n-1 .
- Compute guess as the average of max and min , rounded down (so that it is an integer).
- If array[guess] equals target , then stop.
- If the guess was too low, that is, array[guess] < target , then set min = guess + 1 .
- Otherwise, the guess was too high.
- Go back to step 2.

## Does Java do binary search?

binarySearch () method. The Arrays class in Java provides a ‘binarySearch ()’ method that performs the binary search on the given Array. This method takes the array and the key to be searched as arguments and returns the position of the key in the array. If the key is not found, then the method returns -1.

**How do you write a binary search in Java?**

Binary Search Example in Java

- class BinarySearchExample{
- public static void binarySearch(int arr[], int first, int last, int key){
- int mid = (first + last)/2;
- while( first <= last ){
- if ( arr[mid] < key ){
- first = mid + 1;
- }else if ( arr[mid] == key ){
- System.out.println(“Element is found at index: ” + mid);

**What is binary search explain it with pseudo code and with complexity?**

Binary search is a fast search algorithm with run-time complexity of Ο(log n). This search algorithm works on the principle of divide and conquer. Binary search looks for a particular item by comparing the middle most item of the collection. If a match occurs, then the index of item is returned.

### Which is the mechanism of binary search?

Binary search works on sorted arrays. 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.

### Why do we return 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.

**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.