Logic Building/Phase 4 - Level 3: Transformation/Program

Rotate Left by 1

Rotate array left by one position.

Logic BuildingIntermediate

Logic Building

# Take array
n = int(input("Enter array size: "))
arr = []
for i in range(n):
    arr.append(int(input(f"Element {i+1}: ")))

# Rotate left
if len(arr) > 0:
    first = arr[0]
    for i in range(len(arr) - 1):
        arr[i] = arr[i + 1]
    arr[-1] = first

print(f"After left rotation: {arr}")

Output

Enter array size: 5
Element 1: 1
Element 2: 2
Element 3: 3
Element 4: 4
Element 5: 5
After left rotation: [2, 3, 4, 5, 1]

Shift all elements left, move first to end.

Key Concepts:

Save first element
Shift all elements left
Place first at end

Reverse Array

Rotate Right by 1