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switch/case ?

?? ??? ?? ? ? ?? if/else ??? ????? ??? ?? ???? ? ????. . ?????? ???/??? ??? ?????: 

switch(k)
{
case k1:
  執(zhí)行代碼塊 1 ;
  break;
case k2:
  執(zhí)行代碼塊 2 ;
  break;
default:
  默認執(zhí)行（k 值沒有在 case 中找到匹配時）;
}

?? ??:

????? ?? ?? ????? ?? ?? ? ??? ?? ?????. Case ?? ? ?? ??? ?????, ?? Case ??? ?? ?? break ?? ?????. ?? Case ?? ???? ??? default ??? ?? ?????.

???? ????? 10? ???? ????? ????, ? ??? ?? ??? ???, ??? ?? ?? ??? ???.

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||
<!DOCTYPE html> <html> <body> <p>點擊下面的按鈕來顯示今天是周幾：</p> <button onclick="myFunction()">點擊這里</button> <p id="demo"></p> <script> function myFunction() { var x; var d=new Date().getDay(); switch (d) { case 0: x="Today it's Sunday"; break; case 1: x="Today it's Monday"; break; case 2: x="Today it's Tuesday"; break; case 3: x="Today it's Wednesday"; break; case 4: x="Today it's Thursday"; break; case 5: x="Today it's Friday"; break; case 6: x="Today it's Saturday"; break; } document.getElementById("demo").innerHTML=x; } </script> </body> </html>