In-place reversal modifies the original array without extra space.

Here is a general-purpose implementation:

Code Example: Array Reversal

Here is the Python code:

def reverse_array(arr):
    start, end = 0, len(arr) - 1
    while start < end:
        arr[start], arr[end] = arr[end], arr[start]
        start, end = start + 1, end - 1
        
my_array = [1, 2, 3, 4, 5]
print("Original Array:", my_array)
reverse_array(my_array)
print("Reversed Array:", my_array)