How Does Merge Sort Work?

How Does Merge Sort Work?

Merge sort is a recursive algorithm that continuously splits the array in half until it cannot be further divided (i.e., the array has only one element left, which is considered sorted). Then, the sorted subarrays are merged into one sorted array. This process is repeated until the entire array is sorted....

Approach

The merge function is responsible for merging two sorted subarrays into one sorted array.In this approach, The mergeSort() function recursively divides the array into smaller subarrays, sorts each subarray, and then calls the merge function to merge the sorted subarrays.The printArray() function is used to print the array elements.In the driver code, we define an array $arr, print the original array, call the mergeSort() function to sort the array, and then print the sorted array....