You will be shown an excerpt from a computer science scientific research paper, followed by a question about the paper. Please answer the question. Do not include any text in your response other than the answer.

Context: Most ML systems embed a domain-specific language (DSL) into a host language(e.g. Python, Lua, C++). Possible programming paradigms range from imperative,where the user specifies exactly “how” computation needs to beperformed, and declarative, where the user specification focuses on“what” to be done. Examples of imperative programming include numpy andMatlab, whereas packages such as Caffe, CXXNet program over layer definitionwhich abstracts away and hide the inner-working of actual implementation. The dividing line between the two can be muddy at times. Frameworkssuch as Theano and the more recent Tensorflow can also be viewed as a mixture of both, they declare a computational graph, yet the computation within the graph is imperatively specified.

Question: Would functional programming languages be considered to be a part of the imperative or the declarative paradigm, or neither?
Although the paper describes the difference of imperative and declarative paradigm of the programming language, this question cannot be answered and requires external knowledges since there are no evidential information about the functional programming languages.