語法錯誤：意外令牌

Question

菜鳥編碼器在這裏！

我正在學習codeacademy.org並不斷得到這個錯誤，即使我很確定它已被正確寫入。幫幫我？

// Declare a variable on line 3 called 
// myCountry and give it a string value. 
var myCountry = "Panama"; 
// Use console.log to print out the length of the variable myCountry. 
console.log(.length myCountry); 

// Use console.log to print out the first three letters of myCountry. 
console.log(myCountry .subscript(0,3)); 

Answer 1

有兩個問題與你的例子：

console.log(.length myCountry) 

不是有效的JavaScript;你需要

console.log(myCountry.length) 

（length是變量myCountry的屬性）。

另外，subscript不是JS功能，您需要substring。

完整的示例：

// Declare a variable on line 3 called 
// myCountry and give it a string value. 
var myCountry = "Panama"; 
// Use console.log to print out the length of the variable myCountry. 
console.log(myCountry.length); 

// Use console.log to print out the first three letters of myCountry. 
console.log(myCountry.substring(0, 3)); 

Answer 2

這是正確的答案

var myCountry = "myCountry"; 
console.log("myCountry".length); 


var myCountry = "myCountry"; 
console.log("myCountry".substring(0,3));