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
write an algorithm to calculate the perimeter of a rectangle.
user
algorithm: 
1. start 
2. declare variables length, width, perimeter 
3. read length, width 
4. calculate perimeter as length + width + length + width 
5. print perimeter 
6. end
assistant