as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
create a function to check if an array contains an item.
user
def contains(array, item):
    for element in array:
        if element == item:
            return true
    return false
assistant