SWI-Prolog -- set_output/1

Documentation
- Reference manual
  - Built-in Predicates
    - Input and output
      - Switching between Edinburgh and ISO I/O
        
        set_input/1
        
        set_output/1
        
        current_input/1
        
        current_output/1
- Packages

Availability:built-in

[ISO]set_output(+Stream)

Set the current output stream to become Stream. See also with_output_to/2.