The output a certain field display by using other field values thru the use of tokens, the following modules may be useful. Each differs on the usage, applications and the kind of display and output.
Field Token Value
Available for Drupal 8
Enables to use tokens as field default values.
https://www.drupal.org/project/field_token_value
Field Default Token
Provides a field allowing the value to be set using a string containing tokens.
https://www.drupal.org/project/field_default_token
Concat Field
Allows a selected set of fields to be concatenated together.
https://www.drupal.org/project/concat_field
Field Concat Display
Concatenate fields without saving in database.
https://www.drupal.org/project/field_concat_display
Computed Field
Available for Drupal 8
