Bash-如何使用printf打印多行字符串（带有'\\ n'）

Question

i'm trying to print a multi line strings in printf this way

printf "hi\n"
printf "next line here\n"

I can't do the following

text_content="
hi
next line here
"

printf $text_content

Is there any other way?

Answer 1

Quoting the variable should do the trick. In your example, however, you are getting double newlines.

printf "$text_content"

Answer 2

If printf is not necessary, then you may use echo:

var="one\ntwo"
echo -e $var

Answer 3

Here's another variation.

printf '%s\n' 'first line here' 'second line here'

You can add an arbitrary number of arguments; printf will repeat the format string until all arguments are exhausted.

printf '%s\n' '#!/bin/sh' \
    'for x; do' \
    '    echo "Welcome to my script!"' \
    'done' >script.sh