Source code in the pl/i programming language

fibword: procedure options (main);  /* 9 October 2013 */
   declare (fn, fnp1, fibword) bit (32000) varying;
   declare (i, ln, lnp1, lfibword) fixed binary(31);

   fn = '1'b; fnp1 = '0'b; ln, lnp1 = 1;
   put skip edit (1, length(fn), fn)     (f(2), f(10), x(1), b);
   put skip edit (2, length(fnp1), fnp1) (f(2), f(10), x(1), b);
   do i = 3 to 37;
      lfibword = lnp1 + ln;
      ln = lnp1;
      lnp1 = lfibword;
      if i <= 10 then
         do;
            fibword = fnp1 || fn;
            put skip edit (i, length(fibword), fibword) (f(2), f(10), x(1), b);
            fn = fnp1; fnp1 = fibword;
         end;
      else
         do;
            put skip edit (i, lfibword) (f(2), f(10));
         end;
   end;

end fibword;