What's the cause of the error please

There are a few issues with your code.

First, you capitalized the l in let. Then you placed the equal sign before your constant name, favoriteDessert which also has a space in it that shouldn't be there. Next you forgot the colon after the name of your constant. This is how you state the type, String. Lastly, you forgot to actually set the value of your favorite dessert! Be sure to keep this value between quotations.

let favoriteDessert: String = "cookies"