我在哪里开关状态出错？

Question

我在哪里犯错？

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; 

    } 

我原始切换条件，任何人都可以帮助我吗？我想查找一个（某些计算）模块等于0的数字;

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变量是未定义的。也许你想切换模块变量？

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; 

}