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Python Program for Selection Sort

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  • Difficulty Level : Easy
  • Last Updated : 13 Jun, 2022

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. The algorithm maintains two subarrays in a given array. 

1) The subarray which is already sorted. 

2) Remaining subarray which is unsorted. In every iteration of selection sort, the minimum element (considering ascending order) from the unsorted subarray is picked and moved to the sorted subarray. 

Python3




# Python program for implementation of Selection
# Sort
import sys
A = [64, 25, 12, 22, 11]
 
# Traverse through all array elements
for i in range(len(A)):
  
 # Find the minimum element in remaining
 # unsorted array
 min_idx = i
 for j in range(i+1, len(A)):
  if A[min_idx] > A[j]:
   min_idx = j
    
 # Swap the found minimum element with
 # the first element  
 A[i], A[min_idx] = A[min_idx], A[i]
 
# Driver code to test above
print ("Sorted array")
for i in range(len(A)):
 print("%d" %A[i]),

Output

Sorted array
11
12
22
25
64

Time Complexity:  O(n2).

Auxiliary Space: O(1).

Please refer complete article on Selection Sort for more details!

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