How to understand the array. How to understand the array. Understanding arrays in programming involves grasping their concept, syntax, and common operations associated with them. Here are some key points to help you understand arrays: Definition: An array is a data structure that stores a fixed-size sequence of elements of the same type. It provides a way to organize and access multiple values using a single variable name. Declaration and Initialization: In Java, you declare an array by specifying the type of elements it will hold, followed by square brackets ([]), and the array name. For example, int[] numbers; declares an array of integers named numbers. You can initialize an array during declaration or later using the new keyword and specifying the size in square brackets, such as numbers = new int[5];. Indexing: Arrays use zero-based indexing, meaning the first element is accessed with index 0, the second with index 1, and so on. For example, numbers[0] refers to the first e...
Merge Sort | For Beginners | Java Placement Course >> Merge sort is a popular sorting algorithm that utilizes a divide-and-conquer approach to sort elements in an array. The basic idea behind merge sort is to divide an unsorted array into two halves, recursively sort each half, and then merge the two sorted halves into a single sorted array. >> Merge sort algorithm works by recursively dividing an array into two halves, sorting each half, and then merging them to obtain the sorted array. The basic steps of the merge sort algorithm are as follows: Divide the unsorted array into two halves, mid and left. Sort the left half recursively using merge sort algorithm. Sort the right half recursively using merge sort algorithm. Merge the two sorted halves to obtain the final sorted array. JAVA Implementation: // Merge sort public class MergeSort { //time complexity=nlogn public static void conquer ( int arr [], int ...