freeCodeCamp/curriculum/challenges/chinese-traditional/02-javascript-algorithms-and-data-structures/basic-javascript/appending-variables-to-strings.md

id, title, challengeType, videoUrl, forumTopicId, dashedName

id	title	challengeType	videoUrl	forumTopicId	dashedName
56533eb9ac21ba0edf2244ed	將變量追加到字符串	1	https://scrimba.com/c/cbQmZfa	16656	appending-variables-to-strings

--description--

就像我們可以用多行字符串字面量構建單個字符串一樣，我們還可以使用加且賦值（+=）運算符將字符串追加到字符串的末尾。

示例：

const anAdjective = "awesome!";
let ourStr = "freeCodeCamp is ";
ourStr += anAdjective;

ourStr 值爲 freeCodeCamp is awesome!。

--instructions--

將 someAdjective 設置爲一個至少包含 3 個字符的字符串，然後使用 += 運算符將它追加到 myStr。

--hints--

someAdjective 應當爲包含至少三個字符的字符串。

assert(typeof someAdjective !== 'undefined' && someAdjective.length > 2);

你應該使用 += 運算符將 someAdjective 追加到 myStr。

assert(code.match(/myStr\s*\+=\s*someAdjective\s*/).length > 0);

--seed--

--after-user-code--

(function(){
  var output = [];
  if(typeof someAdjective === 'string') {
    output.push('someAdjective = "' + someAdjective + '"');
  } else {
    output.push('someAdjective is not a string');
  }
  if(typeof myStr === 'string') {
    output.push('myStr = "' + myStr + '"');
  } else {
    output.push('myStr is not a string');
  }
  return output.join('\n');
})();

--seed-contents--

// Change code below this line
const someAdjective = "";
let myStr = "Learning to code is ";

--solutions--

const someAdjective = "neat";
let myStr = "Learning to code is ";
myStr += someAdjective;