在切换条件下我在哪里犯了错误？

Question

我在哪里犯了错误？

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;

    }

我很生意转换条件，任何人都可以帮助我吗？我想找一个（某些计算）模块等于0的数字;

Answer 1

您的mod变量未定义。也许你想要开关模块变量？

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;

}

Answer 2

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;

}