What is Selection Sort Algorithm | Implement Selection Sort Algorithm

What is selection sort algorithm and how to implement selection sort algorithm? Explain selection sort with example. Write a function that implements selection sort algorithm in JavaScript. The selection sort algorithm is a simple sorting algorithm that sorts an array, by repeatedly finding the minimum element from the unsorted part of the array, and swapping it with the first element of the unsorted part. Lets see how to implement selection sort algorithm in javascript.

Here is one implementation of the selection sort algorithm in JavaScript. Define a function that takes an array as an input. It will sort the elements in the array in ascending order. We will use two for loops to implement selection sort algorithm.

The outer for loop will iterate over the entire array, starting from the first index to the second last index. Inside outer for loop, define a variable 'minIndex' that will keep track of the index of the minimum element.

In second loop, For each iteration, select the smallest element from the subarray that starts from the next index of i to the end of the array. in other words find the minimum element from the unsorted part of the array. Store the index of the smallest element in minIndex. Swap the values using a temporary variable 'temp' at the end of each iteration of the outer loop.

Return the sorted array at the end of function. Pass an array to the function and the sorted array will be displayed in the console. In summary, the outer loop iterates over the entire array, and the inner loop finds the minimum element from the unsorted part of the array. The 'minIndex' variable keeps track of the index of the minimum element, and the values are swapped at the end of each iteration of the outer loop. This process is repeated until the entire array is sorted.

This is how to implement a selection sort algorithm in JavaScript.

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It can be a good javascript interview question or frontend interview question. You may not be required to solve it on paper or whiteboard but the interviewer may ask you to give an idea on how to approach this algorithm. If you have an understanding of how to solve this problem or approach this algorithm, you will be able to answer it and get your next job as a frontend developer or full-stack developer.

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