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1. New Array of Squares2. New Array with Only Even Elements3. Replace Negatives with 04. Replace Evens with 1, Odds with 05. Swap First & Last Elements6. Reverse Array7. Rotate Left by 18. Rotate Right by 19. Swap Alternate Elements10. Copy Array Manually

Reverse Array

Reverse the order of array elements.

IntermediatePhase 4 - Level 3: TransformationExample 6 of 10
reverse-array.py
1# Take array
2n = int(input("Enter array size: "))
3arr = []
4for i in range(n):
5    arr.append(int(input(f"Element {i+1}: ")))
6

7# Reverse array
8print(f"Original: {arr}")
9for i in range(len(arr) // 2):
10    arr[i], arr[len(arr) - 1 - i] = arr[len(arr) - 1 - i], arr[i]
11

12print(f"Reversed: {arr}")

Output

Enter array size: 5
Element 1: 1
Element 2: 2
Element 3: 3
Element 4: 4
Element 5: 5
Original: [1, 2, 3, 4, 5]
Reversed: [5, 4, 3, 2, 1]

What's going on

Swap elements from both ends.

Key Concepts:

Swap arr[i] with arr[len-1-i]
Loop only to middle
In-place reversal

🔗Related Content

PreviousSwap First & Last ElementsNextRotate Left by 1