Selection Sort Algorithms Runtime

This sorting algorithm is an in place comparison based algorithm in which the list is divided into two parts the sorted part at the left end and the unsorted part at the right end.

Selection sort algorithms runtime. In applications where the cost of swapping items is high selection sort very well may be the algorithm of choice. It is because the total time taken also depends on some external factors like the compiler used processor s speed etc. The number of elements to be sorted doubles after each iteration from initially 1 024 elements up to 536 870 912 2 29 elements.

Here i am going to go line by line on the selection sort algorithm to compute the algorithms runtime. Stack exchange network stack exchange network consists of 176 q a communities including stack overflow the largest most trusted online community for developers to learn share their knowledge and build their careers. Selection sort is a simple sorting algorithm.

This algorithm sorts an array or list by repeatedly finding the minimum value if we are sorting in ascending order from the list or array and placing it at the beginning of the list. The selection sort algorithm sorts an array by repeatedly finding the minimum element considering ascending order from unsorted part and putting it at the beginning. Save a copy of the currentindex this index will represent the index with the lowest value so we named it minindex.

If the value of the index of the current loop is less than the value of the item at minindex. Selection sort is an algorithm that works by selecting the smallest element from the array and putting it at its correct position and then selecting the second smallest element and putting it at its correct position and so on for ascending order. Selection sort executes in the following steps.

In this tutorial you will understand the working of selection sort with working code in c c java and python. Time complexity is defined as the number of times a particular instruction set is executed rather than the total time is taken. Initially the sorted part is empty and the unsorted part is the entire list.

The algorithm maintains two subarrays in a given array. I have written a test program that measures the runtime of selection sort and all other sorting algorithms covered in this series as follows. Efficiency of an algorithm depends on two parameters.