I just did this one and it took me forever to figure out what I was doing wrong. Finally, I copied and pasted the above solution onto mine and compared. My difference/error was that I put a space in it at the end of the first sentence, like this:
var myStr = “This is the first sentence. “;
myStr +=” This is the second sentence.”;
When I removed the space, it was correct (like @annajuare’s) .
But, both the note on the problem and the example that was given express that space needs to be shown when concatenating strings.
It shows it as:
// Example
var ourStr = "I come first. ";
ourStr += “Iva come second.”;