Array Operations in Python

# Array Creation and Basic Operations
arr = [10, 20, 30, 40, 50]

# Accessing elements
print(f"Element at index 2: {arr[2]}")  # 30

# Insertion at different positions
arr.insert(0, 5)    # Insert at beginning → [5, 10, 20, 30, 40, 50]
arr.insert(3, 25)   # Insert at index 3 → [5, 10, 20, 25, 30, 40, 50]
arr.append(55)      # Insert at end → [5, 10, 20, 25, 30, 40, 50, 55]

# Deletion
arr.pop(2)          # Remove element at index 2
arr.remove(40)      # Remove first occurrence of value 40

# Linear search
def linear_search(array, target):
    for i in range(len(array)):
        if array[i] == target:
            return i
    return -1

# Reversing an array
def reverse_array(array):
    left, right = 0, len(array) - 1
    while left < right:
        array[left], array[right] = array[right], array[left]
        left += 1
        right -= 1
    return array