71 lines
1.7 KiB
Markdown
71 lines
1.7 KiB
Markdown
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---
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id: 56533eb9ac21ba0edf2244b8
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title: Concatenating Strings with the Plus Equals Operator
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cbQmmC4'
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forumTopicId: 16803
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dashedName: concatenating-strings-with-the-plus-equals-operator
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---
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# --description--
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We can also use the `+=` operator to <dfn>concatenate</dfn> a string onto the end of an existing string variable. This can be very helpful to break a long string over several lines.
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**Note**
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Watch out for spaces. Concatenation does not add spaces between concatenated strings, so you'll need to add them yourself.
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Example:
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```js
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var ourStr = "I come first. ";
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ourStr += "I come second.";
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// ourStr is now "I come first. I come second."
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```
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# --instructions--
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Build `myStr` over several lines by concatenating these two strings: `"This is the first sentence. "` and `"This is the second sentence."` using the `+=` operator. Use the `+=` operator similar to how it is shown in the editor. Start by assigning the first string to `myStr`, then add on the second string.
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# --hints--
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`myStr` should have a value of `This is the first sentence. This is the second sentence.`
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```js
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assert(myStr === 'This is the first sentence. This is the second sentence.');
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```
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You should use the `+=` operator to build `myStr`.
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```js
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assert(code.match(/myStr\s*\+=\s*(["']).*\1/g));
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```
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# --seed--
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## --after-user-code--
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```js
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(function(){
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if(typeof myStr === 'string') {
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return 'myStr = "' + myStr + '"';
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} else {
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return 'myStr is not a string';
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}
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})();
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```
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## --seed-contents--
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```js
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// Only change code below this line
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var myStr;
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```
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# --solutions--
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```js
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var myStr = "This is the first sentence. ";
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myStr += "This is the second sentence.";
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```
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