unknown command ':1' haskell [closed]

Question

I just decided to get adventurous and learn some Haskell. I am following along from http://learnyouahaskell.com/. I downloaded the whole Haskell Platform from http://www.haskell.org/platform/mac.html for 64bit Mac Architecture, I already had gcc/command line tools installed, and am not running Mavericks yet.

GHCI runs great, but when I wrote the simple doubleMe exercise, and followed learnyouahaskell's directions to save and run the script, GHCI outputs the following error:
Prelude> :1 baby
unknown command ':1'
use :? for help.

I'm wondering if this command is deprecated or if I'm reading the documentation from LearnYouAHaskell wrong.

Any help is appreciated. Thanks.

---

Thanks to @icktoofay for the syntax help and answering my question. Here is the original source that caused the confusion:

And here is why numeral 1 and the lowercase letter l was confusing in iTerm:

Answer 1

GHCi understands :load or its abbreviation :l, not a colon followed by the numeral one.
A lowercase L and the digit 1 do look very similar, so I can understand your confusion.