我在哪裏開關狀態出錯？

Question

我在哪裏犯錯？

var mod; 
    var module = ((from - to) % mod == 0); 
    switch (mod) 
    { 
     case 20: 
      for (i = 20; i <= to - from; i = i + 20) 
      { 
       //console.log("case"); 
       CanYou(i, from, to) 
      } 
      break; 

    } 

我原始切換條件，任何人都可以幫助我嗎？我想查找一個（某些計算）模塊等於0的數字;

Answer 1

var mod = 2; // need to init this to something 
var module = ((from - to) % mod == 0); 
switch (mod) 
{ 
    case 20: 
     for (i = 20; i <= to - from; i = i + 20) 
     { 
      //console.log("case"); 
      CanYou(i, from, to) 
     } 
     break; 

} 

Answer 2

你的mod變量是未定義的。也許你想切換模塊變量？

var module = ((from - to) % mod == 0); 
switch (module) 
{ 
    case 20: 
     for (i = 20; i <= to - from; i = i + 20) 
     { 
      //console.log("case"); 
      CanYou(i, from, to) 
     } 
     break; 

}