What is another word for fitness function?
Pronunciation: [fˈɪtnəs fˈʌŋkʃən] (IPA) 
A fitness function refers to a particular mathematical function that measures the performance of a computer program or algorithm. This term is commonly used in genetic programming, where fitness functions are used to evaluate the suitability of a genetic algorithm. Another term used interchangeably with fitness function is "evaluation function." This evaluation function measures the individual's or population's fitness level based on their traits or behavior. In the context of machine learning, fitness functions are also known as objective functions, cost functions, or loss functions. The purpose of these functions is to minimize the difference between the model's output and the actual value or label during training.
