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We;ve already touched on difference kinds of Quoting in the shell. But there is an additional subtleties subtlety when handling script arguments.

Specifically: quoting a positional argument preserves argument quoting/grouping by the caller.

So there's a difference between these two ways of calling the helloWorld function inside our script:

# Wihout quotes, all argument grouping by the script caller is lost
helloWorld $@

# With quotes, argument quoting by the script caller is preserved
helloWorld "$@"

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