SWI Prolog , how to assert data to txt file -

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This is my sample source code, I am using SWI Prolog, can someone tell me how to data To be implemented in which the user's key txt.file I want to save the data in txt.file.

Start: -display_menu

Write ('\ n1. User Information Enter'), type ('\ n0.exits'), enter ('\ n enter your choice:'), read (choice), selection (choice), choice = 0

Selection (1): - get_userinfo.

Selection (0): -!

get_userinfo: -write ('\ n * enter user information '), 

  ('\ nEnter the name:' Write (name), write ('\' gender: ''), read (gender), write ('\' enter age: '), read (age), no (age group) ('\ NGet properties'), get_attribute (attr), emphasis (userInfo (name, gender, age, aTTR)).   
 get_attribute: - type ('enter height \'),  
  read (height), attr = [height].   
 Age (age): - Age & lt; 18, write ('enter valid age.').   
 
 
 check; You probably want to open / close 3 and close / use one file to open / close and write / 2.  
 Like:  
  open ('myfile.txt)', write, s), write (s, data), stop (s).

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