# Student answer in question feedback

## Comparison with the student's answer

The main purpose when using this feature is to compare the student's answer with the correct one. Let's ask the following question:

You can add dynamic feedback to the question, that changes based on the student's answer. For example, in this question you could be interested in graphing the student's answer, and compare it to the correct answer:

To do so, you just have to write `parameter answer = 0`

in your CalcMe algorithm and, from then on, the student answer will be stored in a variable called `answer`

. For the feedback example you just looked at, you must end up with this:

LIVE DEMO

Finally, you have to add an answer blank for the wrong answers and use the customized feedback for it.

## Steps to solve the problem

Another purpose when using this feature is to provide the student with the steps they should have followed to answer the question correctly. Let's ask the following question:

You can add dynamic feedback to the question, that changes based on the student's answer. For example, in this question, you could be interested in showing the procedure the student has to follow to answer correctly the question. Moreover, you can also show why the provided answer is not appropriate.

To do so, as in the previous example, you just have to write `parameter answer = 0`

in your CalcMe algorithm and, from then on, the student answer will be stored in a variable called `answer`

. For the customized feedback example you just looked at, you will need to access to the two answers given by the student and to calculate the value of the polynomial in those points. The algorithm must end up with this:

LIVE DEMO

*Index out of the object*message. Once the student answers the question, the answer parameter will have two inputs and the notation will make sense.

Then, you have to add an answer blank for the wrong answers and use the customized feedback for it. Keep an eye on the used notation!

Finally, you have to add the general feedback showing the procedure to solve the problem.