How I tried to tackle the ninth day challenge of #100DaysOfSwiftUI ... having a syntax issue with example C here.

100DaysOfSwitfUI - Day 9 - Checkpoint 5.swift

let luckyNumbers = [7, 4, 38, 21, 16, 15, 12, 33, 31, 49]


print("--- A ---")

// First approach is with closures as parameters ... but how to do the "print one item per line"
// without a for loop?!? We don't know forEach yet, or do we?

for n in luckyNumbers
    .filter({ !$0.isMultiple(of: 2) })
    .sorted(by: { $0 <= $1 })
    .map( { "\($0) is a lucky number" } ) {
    print(n)
}


print("--- B ---")

// Then shortened it using trailing closures ... so far so good

for n in luckyNumbers
    .filter { !$0.isMultiple(of: 2) } .sorted { $0 <= $1 } .map { "\($0) is a lucky number"} {
    print(n)
}


print("--- C ---")

// But what I don't get is: Why is a space as a separator allowed, but a newline isn't ... the
// following code does not run - only difference is, that I added line breaks (and there have
// been spaces before already):

for n in luckyNumbers
    .filter { !$0.isMultiple(of: 2) }
    .sorted { $0 <= $1 }
    .map { "\($0) is a lucky number"} {
    print(n)
}


print("--- D ---")

// With forEach we can get it running even with the line breaks - and avoiding the loop variable
// (as using temporary variables was disallowd according to the description of this echallenge)

luckyNumbers
    .filter { !$0.isMultiple(of: 2) }
    .sorted { $0 <= $1 }
    .map { "\($0) is a lucky number" }
    .forEach { print($0) }