Comparing list of lists

I don't think your logic is quite right (even if you had the break()) because the inner loop would always break on the first element of the inner loop. You can implement a "break" using prog and return (although personally I dislike this approach, as it offends my ideas about structured programming). I think you want:

foreach(char1 ll1
   value=3
   prog(()
     foreach(char2 ll2
       if(car(char1)==car(char2) && cdr(char1)==cdr(char2) then
           value=1
           return()
       )     
      if(car(char1)==car(char2) && cdr(char1)!=cdr(char2) then
           value=2
           return()
      )    
    ) ;inner foreach loop
  )

  if(value==1 then
    printf("character is available and repetitions matched for %L\n" car(char1))
  else
    if(value ==2 then
        printf("character is available but repetitions mismatched for %L\n" car(char1))
      else
         if(value == 3 then
           printf("character not available %L\n" car(char1)))))
)   ;outer foreach loop

I'd probably write it like this instead, which avoids the use return (which is a glorified goto and is hard to follow the code because you have code that sometimes jumps out of the middle of a loop):

foreach(char1 ll1
  value=3
  forall(char2 ll2
    cond(
      (car(char1)==car(char2) && cdr(char1)==cdr(char2)
         value=1
         nil
      )     
      (car(char1)==car(char2) && cdr(char1)!=cdr(char2)
         value=2
         nil
      )  
      (t
         t
      )
     ) 
   ) ;inner forall loop

  case(value
    (1
      printf("character is available and repetitions matched for %L\n" car(char1))
    )
    (2
      printf("character is available but repetitions mismatched for %L\n" car(char1))
    )
    (3
      printf("character not available %L\n" car(char1))
    )
  )
)   ;outer foreach loop

Regards,

Andrew

hi Andrew, Thanks for the corrections. Its working as i desire.