Words, which are also called strings, have quotation marks and can't be used for arithmetic. They're still pretty great, though.

Have a guess: What's the computer going to display?

WalterWhiteWalter White

Yup, the strings are combined without a space. As spaces are also strings, we've got to add them if we want to see them.

Nice try! As it turns out, though, we need to tell computers to add any spaces we want to see.