Hello,
I have completed Lesson 14 in Intro to App Development with Swift (somewhat a Newbie) but I had to get help with one piece of code ("dailyValue") and I don't see where this piece comes from. I could not get this part to run unless it was there.
```
for dailyValue in milesWalked {
var dailyMessage = dailyProgress(dailyNumber: dailyValue)
print(dailyMessage)
}
```
This comes at the bottom of page 16 "Goals."
The piece I am confused about, "dailyValue" does not show up anywhere else in this lesson. Is this one of Swift's built-in values? How did my "help" know to use this particular piece of code? I appreciate any insight you can give.
Thanks!
