@@ -19,6 +19,12 @@ or have them [prefilled in manual pipelines](../pipelines/index.md#prefill-varia
Variable names are limited by the [shell the runner uses](https://docs.gitlab.com/runner/shells/index.html)
to execute scripts. Each shell has its own set of reserved variable names.
To ensure consistent behavior, you should always put variable values in single or double quotes.
Variables are internally parsed by the [Psych YAML parser](https://docs.ruby-lang.org/en/master/Psych.html),
so quoted and unquoted variables might be parsed differently. For example, `VAR1: 012345`
is interpreted as an octal value, so the value becomes `5349`, but `VAR1: "012345"` is parsed
as a string with a value of `012345`.
> For more information about advanced use of GitLab CI/CD:
>
> - <i class="fa fa-youtube-play youtube" aria-hidden="true"></i> Get to productivity faster with these [7 advanced GitLab CI workflow hacks](https://about.gitlab.com/webcast/7cicd-hacks/)
