How can I loop through a field and print each value individually?

Question

I have a field isotope. It's a dropdown field with a single word text input. Only one value (out of 6) can be assigned to an entry. It is not a tag. It is not a category.

I want to create a button for each value within the isotope field.

{% for button in entry.isotope %}  

    <button class="button" data-filter="{{button.title}}">{{button.title}}</button>

{% endear %}

This is wrong and generates the error Variable "entry" does not exist. I know this is basic, but I am obviously missing something.

Answer 1

Variable "entry" does not exist

This error is being caused by the first line of your code:

... in entry.isotope %}

You are either using this template code on an element that isn't an entry or haven't defined a variable called entry anywhere.

So we can help you more, what type of element is this field being used on?