Javascript初學者編程問題-有解無憂

這是我的編碼。

switch(education){
    case "no highschool diploma":
        salary="25636";
        break;
    case "a high school diploma":
        salary="35256";
        break;
    case "an Associate's degree":
        salary = "41496";
        break;
    case "an Bachelor's degree":
        salary = "59124";
        break;
    case "an Master's degree":
        salary = "69732";
        break;
    case "an Professional degree":
        salary = "89960";
        break;
    case "an Doctoral degree":
        salary = "84396";
        break;
}
console.log("In 2015, a person with " education " earned an average of "  salary.toLocaleString("en-US")  "/year.");

我想知道為什么結果

2015年，一個高中畢業的人平均年收入35256。

代替

2015年，擁有高中文憑的人平均年收入為35,256。

我哪里錯了？

uj5u.com熱心網友回復：

您的值是字串，將它們設為數字：

const stringVariable = "12345";
const numberVariable = 12345;

console.log(stringVariable.toLocaleString("en-US")); // Logs 12345
console.log(numberVariable.toLocaleString("en-US")); // Logs 12,345

uj5u.com熱心網友回復：

您正在使用字串型別，您需要先轉換為數字。 console.log("In 2015, a person with " education " earned an average of " Number(salary).toLocaleString("en-US") "/year.");

uj5u.com熱心網友回復：

這是因為salary="35256" 作為字串傳遞。嘗試更改為salary=35256，它應該可以作業

uj5u.com熱心網友回復：

不同的資料型別（例如 Number、String、Date）通常有自己的實作.toLocaleString()

因為您呼叫.toLocaleString()的是字串，所以您當前使用的是 Object 資料型別中定義的默認實作，該實作不會被覆寫。

但是，如果您想使用與數字關聯的版本。Number()您可以在呼叫之前使用將字串轉換為數字.toLocaleString()。

如果您想了解更多資訊，請閱讀：https ://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toLocaleString

演示

const education = "a high school diploma";

switch(education){
    case "no highschool diploma":
        salary="25636";
        break;
    case "a high school diploma":
        salary="35256";
        break;
    case "an Associate's degree":
        salary = "41496";
        break;
    case "an Bachelor's degree":
        salary = "59124";
        break;
    case "an Master's degree":
        salary = "69732";
        break;
    case "an Professional degree":
        salary = "89960";
        break;
    case "an Doctoral degree":
        salary = "84396";
        break;
}
console.log("In 2015, a person with " education " earned an average of "   Number(salary).toLocaleString("en-US")  "/year.");

uj5u.com熱心網友回復：

使用整數值而不是字串值

請以這種方式編碼...

const edu_salary =
  { "no highschool diploma"  : 25636
  , "a high school diploma"  : 35256
  , "an Associate's degree"  : 41496
  , "an Bachelor's degree"   : 59124
  , "an Master's degree"     : 69732
  , "an Professional degree" : 89960
  , "an Doctoral degree"     : 84396
  }

let education = "a high school diploma"

console.log(`In 2015, a person with ${education} earned an average of ${edu_salary[education].toLocaleString('en-US')}/year.`)

.as-console-wrapper {max-height: 100% !important;top: 0;}
.as-console-row::after {display: none !important;}

轉載請註明出處，本文鏈接：https://www.uj5u.com/qita/469212.html

標籤：javascript

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