Printf example in bash does not create a newline

Question

Working with printf in a bash script, adding no spaces after \"\\n\" does not create a newline, whereas adding a space creates a newline, e. g.:

Answer 1

Works ok if you add "\r"

$ nl=`printf "\n\r"` && echo "1${nl}2"
1
2

Answer 2

$ printf -v NewLine "\n"
$ echo -e "Firstline${NewLine}Lastline"

Firstline
Lastline

$ echo "Firstline${NewLine}Lastline"
Firstline
Lastline