prolog - Purpose of param in do-loops -


I'm learning to learn Prolog from the "Prolog" book. I am quite a newbie in Prolol.

R]), (Foreshem (e, matrix, [i, j]), the ultimate (transpose) subscript (transjees, [j, ii], e)). Play

: 

  matrix = [] ([] (11,12), [] (21,22), [] (31,32 )), Moved (matrix, transposed). Results  
  matrix = [] ([] (11, 12), [] (21, 22), [] (31, 32)   
 I do not understand the purpose of  param   
   
 / code>. Please help me understand. Thank you.  
 
 
 variable  transpose  listed  param  so that it does  do / 2  should be available inside the loop.  
 Consider the  do / 2  call macros as ECLIPs compiler turns them into assisted predictions.  
 Your Bill  transpo Something like:  
  Transfer (matrix, transjections): - dim (matrix, [r, c]), dim (transges, [c, r ]), Do__1 (..., transjees). Do__1 (..., transjees): -!! Do__1 (..., transges): - Forummusic, subscript (transjeges, [j, ii], e), dod_1 ( ..., transges).   
 how  do__1  actually looks for the ends of the  foreachelem , I do not know. But in any case, all the variables in the  param  entry are added to the variable in the  do__1  head, so they can be available within the predictive forecast. Without it, the  transpose / 2  bills of  do / 2  inside the loop  transpose  variable  transpose  outside of the variable Loop  
  Edit : A good introduction to  do / 2  - Loop in ECLiPSe, in which very     Can be found in Chapter 7 of "limited logic programming using CCLIPS" by Krzisstuff App and Mark Wallace.

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