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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

Rotate Left by 1

Rotate array left by one position.

IntermediatePhase 4 - Level 3: TransformationExample 7 of 10
rotate-left-by-1.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# Rotate left
8if len(arr) > 0:
9    first = arr[0]
10    for i in range(len(arr) - 1):
11        arr[i] = arr[i + 1]
12    arr[-1] = first
13

14print(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]

What's going on

Shift all elements left, move first to end.

Key Concepts:

Save first element
Shift all elements left
Place first at end

🔗Related Content

PreviousReverse ArrayNextRotate Right by 1