String Concatenation is letting me compile building number & the Street! Is it a bug or a new feature?

My guess is that you declared the buildingNumber variable differently from the way Pasan did it. In the video, the code looks like this:

let street = "West Street"
let buildingNumber = 222

let streetAddress = buildingNumber + street

This code does not compile because street and buildingAddress are different types. Basically you have text and a number and Swift doesn't know how those should be added together.

My guess is that when you created the buildingNumber constant, you placed quotes around the number:

let buildingNumber = "222"

This would make it so the street and buildingNumber values can be added together because the buildingNumber is a String instead of a number.

Hope that sorts it out for you!

Thanks for posting and answering this question! Helped a lot!