How can I have a newline in a string in sh?

Question

This

STR=\"Hello\\nWorld\"
echo $STR

produces as output

Hello\\nWorld

instead of

Hello
Wo         


        

Answer 1

I wasn't really happy with any of the options here. This is what worked for me.

str=$(printf "%s" "first line")
str=$(printf "$str\n%s" "another line")
str=$(printf "$str\n%s" "and another line")