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- The selection sort algorithm sorts an array by repeatedly finding the minimum element from unsorted part and put it at the beginning. The algorithm maintains two subarrays in a given array.
- The subarray which is already sorted
- Remaining subarray which is unsorted
- In every iteration of selection sort, the minimum element from the unsorted subarray is picked and moved to the sorted subarray
- Selection sort is an in-place algorithm meaning you won’t need to allocate additional lists
- While slow, it is still used as the main sorting algorithm in systems where memory is limited
Get the elements from user
#Get the elements from user
n = int(input("Enter the number of elements:"))
A=[]
print("Enter the elements:")
for i in range(n):
A.append(int(input()))
# 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]
print("Sorted Array:")
for i in range(n):
print("At index",i,"the element is:",A[i])Output
Enter the number of elements: 4
Enter the elements:
21
-1
4
3
Sorted Array:
At index 0 the element is: -1
At index 1 the element is: 3
At index 2 the element is: 4
At index 3 the element is: 21Example:
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