Adding custom fields/Integer Field
From Joomla! Documentation
Articles in this Series
Provides a drop down list of integers between a minimum (first) and maximum (last) value.
Special options within this field are:
Allow multiple values to be selected.
This value is the lowest on the list.
This value is the highest on the list.
Each option will be the previous option incremented by this integer, starting with the first value until the last value is reached.
Creating the field
Let's say you create a field with the options shown in the next figure.
Using the field in the backend
In the backend while creating an article or a contact you see the field like in the following imageː
Using the field in the frontend
In the frontend, you can see the field as you see in the following image. The option Automatic display is responsible for the position of the field and your template is responsible for the design of the field.