使用递归函数查找数组中的数字时出现堆栈溢出错误

def find_number_recursive(arr, target, index):
    if index >= len(arr):
        return -1
    if arr[index] == target:
        return index
    return find_number_recursive(arr, target, index+1)

arr = [1, 2, 3, 4, 5]
target = 3
result = find_number_recursive(arr, target, 0)
print(result)

def find_number_iterative(arr, target):
    for i in range(len(arr)):
        if arr[i] == target:
            return i
    return -1

arr = [1, 2, 3, 4, 5]
target = 3
result = find_number_iterative(arr, target)
print(result)