koalaman / shellcheck Public
SC2291
Vidar Holen edited this page Jul 27, 2021
·
1 revision
Quote repeated spaces to avoid them collapsing into one.
Problematic code:
echo Hello WorldCorrect code:
echo "Hello World"Rationale:
ShellCheck found multiple unquoted spaces between words passed to echo. Due to the way arguments are interpreted and passed in the shell, these will collapse into a single space:
$ echo Hello World
Hello World
If you want to output multiple spaces, such as when creating a notice or banner, make sure the spaces are quoted, e.g. by adding (or extending) double quotes to include them:
$ echo "Hello World"
Hello World
Exceptions:
If you're aware of this behavior and didn't want multiple spaces to show up in the output, you can either remove the unnecessary spaces or ignore this issue.
Related resources:
- Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!