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switch Óï¾ä
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switch (expression)
{
case label1:
  code to be executed if expression = label1;
  break; 
case label2:
  code to be executed if expression = label2;
  break;
default:
  code to be executed
  if expression is different
  from both label1 and label2;
}
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¹¤×÷Ô­Àí£º
1         ¶Ô±í´ïʽ£¨Í¨³£ÊDZäÁ¿£©½øÐÐÒ»´Î¼ÆËã
2         °Ñ±í´ïʽµÄÖµÓë½á¹¹ÖÐ case µÄÖµ½øÐбȽÏ
3         Èç¹û´æÔÚÆ¥Å䣬ÔòÖ´ÐÐÓë case ¹ØÁªµÄ´úÂë
4         ´úÂëÖ´Ðкó£¬break Óï¾ä×èÖ¹´úÂëÌøÈëÏÂÒ»¸ö case ÖмÌÐøÖ´ÐÐ
5         Èç¹ûûÓÐ case ÎªÕæ£¬ÔòʹÓà default Óï¾ä
<?php
switch ($x)
{
case 1:
  echo "Number 1";
  break;
case 2:
  echo "Number 2";
  break;
case 3:
  echo "Number 3";
  break;
default:
  echo "No number between 1 and 3";
}
?>
 
</body>
</html>
 


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