Functional requirement

Question

I have a application about diagnosis and should determine the functional and nonfunctional requirement So can anyone help me with this question please: Is language considered as a functional requirement?

Answer 1

A functional requirement defines what the software is supposed to do. A non-functional requirement defines further expectations independent from the actual features.

Ex: functional requirement = "software should square the input value"

non-functional requirement = "software should use at max 1MB memory"

Note: This does not have anything to do with "Functional Programming"

Answer 2

Functional requirements define what the software will do.

Non-functional requirements are any requirements that don't describe the system's input/output behaviour.

Having "language" as a requirement: When you refer to the language of the input/output, it is a functional requirement. In the case you mean the programming language, it is a non-functional requirement.

Hope this helps maybe somebody else.