Okay, I think I get it... And if you're not at top-level, ie you're in a function definition, you actually can't use "let" without an "in". That is a little we

Okay, I think I get it... And if you're not at top-level, ie you're in a function definition, you actually can't use "let" without an "in". That is a little weird, but not terrible. Thanks for the explanation.