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User functions

WirisQuizzes Studio uses symbolic notation to work with variables and symbols. This is extremely useful, but f(x) is understood as a multiplication f·x. If we want that to be interpreted as a function f evaluated at a point x, we need to declare it as a User function in Input options > Input syntax > Define a new function.



Let us see a question example.


This is the well-known statement of the Fibonacci sequence. We ask for two answers: the relation and a particular term of the series. Thus, the Correct answer editor will look like


Note that since ff is marked as a User function, it is shown in blue, as any other elemental function (sin,cos,...). This feature is also useful when considering the composition of function questions.