æ«å°¾å帰ã¨ããèããç¥ã£ã¦éããªãé ãé¢æ°ã®å é¨ã§é¢æ°ãå®ç¾©ãããã¨ã«ã¾ã éåæãæã£ã¦ããã®ã§ãnamed letãç¥ã£ã¦ãããã°ããã¯æ«å°¾å帰ã§æ¸ãããã®ã¯ä½ã§ãnamed letã§æ¸ãã¦ããã internal defineã«é¦´ãã¦named letçãã®ææãéããé ããã¡ãã£ã¨å¤§ããª(ã¨è¨ã£ã¦ããããç¥ãã¦ã¦ãã¾ã200è¡ã¨ã300è¡ã¨ãã®)ããã°ã©ã ãæ¥ã«æ¸ããããã«ãªã£ãã®ãè¦ãã¦ããã named letã¯ç°¡åãªã«ã¼ãã®ãããªãã®ãæ¸ãã¨ãã«ã¯ä¾¿å©ã ãã©ãå°ãå¦çãè¤éã«ãªã£ã¦ããã¨ããã«æ¸ãã«ãããªã£ã¦ããããã«æãããinternal defineã®(æ«å°¾å帰çãªå¦çãæ¸ãã¨ãã«named letã«å¯¾ãã¦æã¤)åªä½æ§ã¯2ã¤ãããã®ãã¨ã«èµ·å ããããããªããã¨æãã ã¾ããåæå¤ã®è¨å®ãé ããããã¨ãã§ãããã¨ãnamed letã§ã¯ã (define (sum n) (
{{#tags}}- {{label}}
{{/tags}}