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Selection sort

In computer science, selection sort is an in-place comparison sorting algorithm. It has a O(n2) time complexity, which makes it inefficient on large lists, and generally performs worse than the similar insertion sort. Selection sort is noted for its simplicity and has performance advantages over more complicated algorithms in certain situations…

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Comparison to other sorting algorithms

10 related topics

Variants

8 related topics

Example

1 related topics

Complexity

1 related topics

Key facts & relationships

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Average performance
O ( n 2 ) {\displaystyle O(n^{2})} comparisons, O ( n ) {\displaystyle O(n)} swaps
Best-case performance
O ( n 2 ) {\displaystyle O(n^{2})} comparisons, O ( 1 ) {\displaystyle O(1)} swap
Class
Sorting algorithm
Data structure
Array
Optimal
No
Worst-case performance
O ( n 2 ) {\displaystyle O(n^{2})} comparisons, O ( n ) {\displaystyle O(n)} swaps

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Overview

Example

Complexity

Comparison to other sorting algorithms

Variants

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Map overview Semantic statistics

Selection sort

Nodes33
Edges32
Triples26
Avg. degree1.94
Density0.060606
Components1

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Selection sort

Top relations

related to Comparison to other sorting algorithms · 5
Selection sort → Among, However, Insertion, It, Simple
related to Complexity · 5
Selection sort → By, Finding, Selecting, Selection, Therefore
related to Variants · 4
Selection sort → Heapsort, It, Theta, This
related to External links · 3
Selection sort → Animated Sorting Algorithms, March, Wayback Machine
Average performance · 1
Selection sort → O ( n 2 ) {\displaystyle O(n^{2})} comparisons, O ( n ) {\displaystyle O(n)} swaps
Best-case performance · 1
Selection sort → O ( n 2 ) {\displaystyle O(n^{2})} comparisons, O ( 1 ) {\displaystyle O(1)} swap
Class · 1
Selection sort → Sorting algorithm
Data structure · 1
Selection sort → Array
Optimal · 1
Selection sort → No
Worst-case performance · 1
Selection sort → O ( n 2 ) {\displaystyle O(n^{2})} comparisons, O ( n ) {\displaystyle O(n)} swaps

Important terminology Word statistics

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Important terminology

sort selection sorting displaystyle algorithm sorted insertion algorithms complexity list elements minimum order array comparisons two items remaining element time

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Selection sortAverage performanceO ( n 2 ) {\displaystyle O(n^{2})} comparisons, O ( n ) {\displaystyle O(n)} swaps1.00infobox
Selection sortBest-case performanceO ( n 2 ) {\displaystyle O(n^{2})} comparisons, O ( 1 ) {\displaystyle O(1)} swap1.00infobox
Selection sortClassSorting algorithm1.00infobox
Selection sortData structureArray1.00infobox
Selection sortOptimalNo1.00infobox
Selection sortWorst-case performanceO ( n 2 ) {\displaystyle O(n^{2})} comparisons, O ( n ) {\displaystyle O(n)} swaps1.00infobox
Selection sortWorst-case space complexityO ( 1 ) {\displaystyle O(1)} auxiliary1.00infobox
Selection sortis ain-place comparison sorting algorithm0.90text
mergesortinstance ofdivide-and-conquer algorithms0.80text
Selection sortrelated to Comparison to other sorting algorithmsAmong0.60section
Selection sortrelated to Comparison to other sorting algorithmsInsertion0.60section
Selection sortrelated to Comparison to other sorting algorithmsSimple0.60section

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