In the right answer there´s a space between the final point and the double quotes.
It´s a little bit hard to find that mistake when not using “ctrl+c , ctrl+v”.
My sugestion is to eliminate that space. Because in the second sentece it doesn´t exist.
Your code so far
// Only change code below this line var myStr = "This is the first sentence. "; myStr += "This is the second sentence.";
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Challenge: Concatenating Strings with the Plus Equals Operator
Link to the challenge: