// Example
var ourStr = "I come first. ";
ourStr += "I come second.";
// Only change code below this line
var myStr = "This is the first sentence.";
myStr += "This is the second sentence.";
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User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.80 Safari/537.36.
Read carefully what they are asking you. Look at the first string, it is not the same as your first string.
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.