By default echo simply prints \n literally as is, instead of printing a newline. To force it to print newline, use -e flag to parse as regex, e.g.:

echo "Hello\nWorld!"      # Prints "Hello\nWorld!" in a single line
echo -e "Hello\nWorld!"   # Prints "Hello", breaks line, then "World!"

Or, simply use printf instead.

References:

• https://stackoverflow.com/questions/8467424/echo-newline-in-bash-prints-literal-n?rq=1