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   ¼Õº´¸ñ  (2002-03-27 00:33:54, Hit : 18795, Vote : 2237)
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   PHP ¹®¹ýÀÇ ±âÃÊ(4) - Á¦¾î¹®(ù»)
À̹ø ½Ã°£¿¡´Â for¹®, break, continue, switch ¹® µî¿¡ ´ëÇØ ¾Ë¾Æ º¸°Ú½À´Ï´Ù.
for ¹®Àº ½ÇÁ¦ ÇÁ·Î±×·¡¹Ö¿¡¼­ ¹Ýº¹¹®À¸·Î ¸Å¿ì ¸¹ÀÌ »ç¿ëµË´Ï´Ù. ³ª¸ÓÁö break, continue, switch ¹®µµ ¸Å¿ì À¯¿ëÇÏ°Ô »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù.
°£´ÜÇÑ ¿¹Á¦¸¦ ÅëÇØ À§ÀÇ Á¦¾î¹®µé¿¡ ´ëÇØ ²À ÀÌÇØÇÏ°í ³Ñ¾î°¡´Â ½Ã°£ÀÌ µÇ¾úÀ¸¸é ÁÁ°Ú½À´Ï´Ù.


  1. for ¹®
    for ¹®Àº,
    for (Ç¥Çö½Ä1 ; Ç¥Çö½Ä2 ; Ç¥Çö½Ä3)
    ¸í·É¹®
    °ú °°Àº ½ÄÀ¸·Î »ç¿ëµË´Ï´Ù.
    ¿©±â¼­ Ç¥Çö½Ä1Àº for ¹®À» ½ÃÀÛÇÒ ¶§ óÀ½ ½ÇÇàµÇ´Â ½ÄÀÔ´Ï´Ù.
    Ç¥Çö½Ä2´Â °Ë»ç Á¶°ÇÀ» ³ªÅ¸³»´Âµ¥ Ç¥Çö½Ä2°¡ ÂüÀÏ °æ¿ì¿¡¸¸ ¸í·É¹®ÀÌ ½ÇÇàµË´Ï´Ù.
    Ç¥Çö½Ä3Àº ¹Ýº¹ÀÌ ³¡³ª°í ½ÇÇàµÇ´Â ½ÄÀÔ´Ï´Ù.

    1ºÎÅÍ 10±îÁöÀÇ Çհ踦 ±¸ÇÏ´Â ÇÁ·Î±×·¥À» while ¹®°ú for ¹®À» ÀÌ¿ëÇØ ¸¸µé¾î º¸°í ±× Â÷ÀÌÁ¡À» »ìÆì º¾½Ã´Ù.

    1 : <?
    2 : //1ºÎÅÍ 10±îÁöÀÇ Çհ踦 while ¹®À» ÀÌ¿ëÇؼ­
    3 : $sum = 0 ;
    4 : $number = 1 ;
    5 : while ($number < 10 ) {
    6 : $sum = $sum + $number ;
    7 : $number = $number + 1 ;
    8 : }
    9 : echo "1ºÎÅÍ $number ±îÁöÀÇ ÇÕ°è = $sum <br>";
    10 :
    11 : //1ºÎÅÍ 10±îÁöÀÇ Çհ踦 for ¹®À» ÀÌ¿ëÇؼ­
    12 : $sum = 0 ;
    13 : $number = 1 ;
    14 : for($number = 1 ; $number < 10 ; $number++) {
    15 : $sum = $sum + $number;
    16 : }
    17 : echo "1ºÎÅÍ $number ±îÁöÀÇ ÇÕ°è = $sum";
    18 : ?>

    14ÇàÀÌ ÇÙ½ÉÀÌÁÒ.
    ¸ÕÀú $number=1 ÀÌ ¸ÕÀú ½ÇÇàµË´Ï´Ù. ±×¸®°í $number < 10ÀÎÁö °Ë»çÇÕ´Ï´Ù. ¸¸¾à ÂüÀ̸é $sum=$sum+$number°¡ ½ÇÇàµË´Ï´Ù. ±×¸®°í $number++ÀÌ ½ÇÇàµË´Ï´Ù. ±×¸®°í ´Ù½Ã $number < 10ÀÎÁö °Ë»çÇÏ¿© ÂüÀ̸é $sum=$sum+$number°¡ ½ÇÇàµË´Ï´Ù.
    10±îÁöÀÇ Çհ踦 ±¸ÇÏ·Á¸é ÀÌ·± ½ÄÀ¸·Î Çϴ±¸³ªÇÏ´Â Á¤µµÀÇ ³í¸®ÀûÀÎ ÇØ°áÀº ÇÒ ÁÙ ¾Ë¾Æ¾ß ÇÕ´Ï´Ù. ÀÌÇØµÉ ¶§±îÁö º¸½Ã±¸¿ä.
    Âü, ¿©±â¼­ $number++ Àº $number=$number+1°ú °°Àº ¶æÀÔ´Ï´Ù.


  2. break ¹®°ú continue ¹®
    break¸¦ ¸¸³ª¸é for, while, switch µîÀÇ ¹Ýº¹¹®À» ºüÁ®³ª°©´Ï´Ù.
    ¹Ý´ë·Î continue¸¦ ¸¸³ª¸é ¹Ýº¹¹®ÀÇ Ã³À½À¸·Î µÇµ¹¾Æ °©´Ï´Ù.
    °£´ÜÇÑ ¿¹Á¦¸¦ ÅëÇØ Á÷Á¢ ´«À¸·Î È®ÀÎÇØ º¾½Ã´Ù.

    1 : <?
    2 : // break ¹®À» ÀÌ¿ëÇÏ¿© ¹Ýº¹¹® ºüÁ® ³ª°¡±â
    3 : $sum = 0 ;
    4 : $count = 1;
    5 : while(TRUE) {
    6 : $sum = $sum + $count ;
    7 : $count = $count + 1 ;
    8 : if ($count == 10) break ;
    9 : }
    10 : echo "1ºÎÅÍ $count ±îÁöÀÇ ÇÕ°è = $sum <br>";
    11 :
    12 : // 1ºÎÅÍ 10±îÁöÀÇ Á¤¼ö Áß È¦¼öÀÇ ÇÕ°è ±¸Çϱâ
    13 : $sum = 0;
    14 : $count = 0;
    15 : while ($count < 10) {
    16 : $count++ ;
    17 : if($count % 2 == 0) continue;
    18 : $sum = $sum + $count ;
    19 : }
    20 : echo "1ºÎÅÍ $count Á¤¼ö Áß¿¡¼­ Ȧ¼öÀÇ ÇÕ = $sum ";
    21 : ?>

    5ÇàÀ» º¸¸é Á¶°ÇÀÌ ¹«Á¶°Ç ÂüÀÎ °ÍÀ» ¾Ë ¼ö ÀÖ½À´Ï´Ù. ÀÌ°ÍÀº ¹«Á¶°Ç ¹Ýº¹Ç϶ó´Â ¶æÀÔ´Ï´Ù. ±×¸®°í ¹Ýº¹¹® ¾È¿¡¼­ break ¹®À» »ç¿ëÇؼ­ ºüÁ®³ª°¡°Ô µË´Ï´Ù.(½Ç¹«¿¡¼­µµ ÀÌ·± ½ÄÀ¸·Î ÀÚÁÖ »ç¿ëÇÕ´Ï´Ù.)
    8ÇàÀ» º¸¸é $count°¡ 10ÀÌ¸é ¹Ýº¹¹®À» ºüÁ®³ª°¡´Â °ÍÀ» ¾Ë ¼ö ÀÖ½À´Ï´Ù.
    17ÇàÀ» º¸¸é $count¸¦ 2·Î ³ª´« ³ª¸ÓÁö°¡ 0À̸é, Áï 2ÀÇ ¹è¼ö(¦¼ö)À̸é 18ÇàÀ» ½ÇÇàÇÏÁö ¸»°í 15ÇàÀ¸·Î ´Ù½Ã µ¹¾Æ°¡¶ó´Â ¶æÀÔ´Ï´Ù.
    16ÇàÀÇ $count++Àº $count=$count+1°ú °°Àº ¶æÀÔ´Ï´Ù.
    ºñ½ÁÇÑ ¹æ½ÄÀ¸·Î 18ÇàÀÇ $sum=$sum+$count¸¦ $sum+=$count·Î ¹Ù²ã¼­ »ç¿ëÇصµ µË´Ï´Ù. (ÀÌ·± °ÍÀº ¸ðµÎ C¾ð¾îÀÇ ¿¬»êÀÚ¸¦ ±×´ë·Î À̾î¹ÞÀº °æ¿ì¶ó°í ÇÒ ¼ö ÀÖ½À´Ï´Ù.)

  3. switch ¹®
    switch ¹®Àº ¿©·¯ °³ÀÇ if ¹®À» »ç¿ëÇÏ´Â °Í°ú ºñ½ÁÇÑ È¿°ú¸¦ ³À´Ï´Ù.
    Çü½ÄÀº,
    switch(Ç¥Çö½Ä) {
    case Ç¥Çö½Ä1 :
    ¸í·É¹®1
    case Ç¥Çö½Ä1 :
    ¸í·É¹®1
    ¡¦
    default
    ¸í·É¹®
    }
    ¿Í °°ÀÌ »ç¿ëÇÕ´Ï´Ù.

    1 : <?
    2 : $number = 10 ;
    3 : switch ($number) {
    4 :         case $number < 0 :
    5 :                 echo "$number ´Â À½¼öÀÔ´Ï´Ù.";
    6 :                 break;
    7 :         case 0 : // case $number == 0; °ú µ¿ÀÏÇÔ
    8 :                 echo "$number ´Â 0ÀÔ´Ï´Ù.";
    9 :                 break;
    10 :         case $number > 0 ;
    11 :                 echo "$number ´Â ¾ç¼öÀÔ´Ï´Ù.";
    12 :                 break;
    13 : }
    14 : ?>

    3ÇàÀÇ $numberÀÇ °ªÀ» ±âÁØÀ¸·Î case ¹®¿¡¼­ ÀÏÄ¡ÇÏ´Â °ªÀÌ ÀÖÀ¸¸é ±× ¸í·É¹®À» ½ÇÇàÇÕ´Ï´Ù.
    ¸¸¾à ÇØ´ç »çÇ×ÀÌ ¾øÀ» °æ¿ì defaultÀÇ ¸í·É¹®À» ½ÇÇàÇϴµ¥ ¿©±â¼­´Â default¸¦ »ç¿ëÇÏÁö ¾Ê¾Ò½À´Ï´Ù.


ÇÁ·Î±×·¡¹ÖÀ» Á¤¸» óÀ½À¸·Î Á¢ÇÑ ºÐÀ̶ó¸é À̹ø ½Ã°£ÀÇ ³»¿ëÀÌ ¾î·Æ°Ô ´À²¸Áú ¼öµµ ÀÖ½À´Ï´Ù. Á¦°¡ 'ÀÌ·± °ÍÀº C¿Í ºñ½ÁÇÕ´Ï´Ù.'¶ó°í ¸»ÇÏ´Â °ÍÀÌ ¾Æ¹«·± Àǹ̾øÀÌ ´Ù°¡¿À´Â ºÐÀÌ ºÐ¸í ÀÖÀ» °Ì´Ï´Ù. ±×·¯¸é ±×³É ¹«½ÃÇÏ°í ³Ñ¾î°¡¼¼¿ä. ¿­¹øÀÇ ¼³¸íº¸´Ù ½ÇÁ¦ Äڵ带 ½º½º·Î ¿­¹ø ¶Õ¾îÁö°Ô ÃÄ´Ùº¸´Â °ÍÀÌ ´õ Áß¿äÇÕ´Ï´Ù. ±×·¯¸é ÀÚ¿¬½º·¹ ÀÌÇØ°¡ µÇ°Ô µÇ¾î ÀÖ½À´Ï´Ù.

¹ú½á ¼ö¿äÀÏ »õº®ÀÔ´Ï´Ù. ÁöÄ¡Áö ¸»°í ÁÖ¸»À» ¹Ù¶óº¸°í ÈûÂ÷°Ô »ýÈ°ÇßÀ¸¸é ÁÁ°Ú½À´Ï´Ù.
ÀÌ»ó µ¿Á־ƺü ¼Õº´¸ñÀ̾ú½À´Ï´Ù.


¼Õº´¸ñ
À§ ÄÚµå Áß¿¡¼­
for($number = 1 ; $number < 10 ; $number++) {
¿¡¼­, $number < 10 À» $number <= 10·Î Á¤Á¤ÇÕ´Ï´Ù.
 2002/12/26 01:17:00    

¼Õº´¸ñ
¸¶Âù°¡Áö·Î while ¹®¿¡¼­µµ
while ($number < 10 ) {
¸¦
while ($number <= 10 ) {
·Î Á¤Á¤ÇÕ´Ï´Ù.
 2004/03/01 17:08:39    

¼Õº´¸ñ
1ºÎÅÍ 10±îÁöÀÇ ÇÕÀ» 45¶ó°í ÇÏ´Ù´Ï... ¤»¤» Àü ¾Æ¹«·¡µµ µµ¿Ã¸Ó¸®Àΰ¡ º¾´Ï´Ù^^
1ºÎÅÍ 10±îÁöÀÇ ÇÕÀº 55ÀÔ´Ï´Ù. (È­¸éÀÇ ±×¸²µµ 55·Î Á¤Á¤ÇÕ´Ï´Ù...)
 2004/03/01 17:10:02    
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