make sure your variable is named language

var language = "Swift"

Your variable looks like this:

var str = "swift"

A variable has 4 components:

• The variable keyword (var)
• The name of the variable (in your case str)
• The assignment operator (=)
• The variable's value (in your case "swift")

The error you are getting says you need to make sure you have a variable named language, so you should change the second component I listed to fix that. Though your code technically works, the challenge expects a specific name for the variable.

As a side note, make sure the casing of the string you assign the variable to is correct. Swift might be correct while swift could cause the challenge to fail.