<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
Create a program that reverses an array
Array = [1,2,3,4,5]<|im_end|>
<|im_start|>assistant
def reverse(arr):
    start = 0
    end = len(arr)-1
    while start < end:
        arr[start], arr[end] = arr[end], arr[start]
        start += 1
        end -= 1
    return arr

arr = [1,2,3,4,5]

print(reverse(arr))<|im_end|>
