`print'
-------

print(OBJ [,NL])
     :: OBJ ɽ.

RETURN
     0
OBJ
     Ǥ
NL
     ե饰 (Ǥ)

   * OBJ ɾɽ.
   *  2  0 ξԤ, ʳϲԤ.
   * ȡͤ 0 Ǥ뤫, `print();'Ǽ¹Ԥ, Ϥθ
      0 ֤.  `print()$' Ȥ, Ǹ 0 ϽϤʤ.
   * ʣ OBJ Ʊ˽Ϥ OBJ ꥹȤˤȤ褤.

     [8] def cat(L) { while ( L != [] ) { print(car(L),0); L = cdr(L);} print(""); }
     [9] cat([xyz,123,"gahaha"])$
     xyz123gahaha

