repeat/0 is commonly used for failure driven loops, for example to read data. Below is the common skeleton:

  repeat,
    read(Term),
    (  Term == end_of_file
    -> !
    ;  process(Term),
       fail
    ).

The disadvantage of such failure driven loops is that possibly failure of the process predicate does not abort the loop and thus is easily missed.

See also

- between/3