Basic Java script "Concatenating Strings with the Plus Equals Operator"

I really don’t get it what i’m doing doing wrong, i’m pretty sure i’m following the instructions but i keep getting these error

myStr should have a single space character between the two strings.

myStr should have a value of the string This is the first sentence. This is the second sentence.

You should use the += operator to build myStr.

let myStr = "This is the first sentence. ";
mystr += "This is the second sentence.";

Please share the link to the challenge you’re working on.

You’ve got a typo error. You’re trying to concatenate to a variable named mystr, but does a variable with that name exist?

Ohhh /facepalm, i saw it now.

thanks for the answer mate

By the way, the console error was telling you the same thing just in a less human-friendly way:

ReferenceError: mystr is not defined

Take a mental note so that next time you see that error you know what it means!