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How can I declare a function as "private" in Bash?

in Scripting by (245) 7

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Bash does not have the concept of public/private functions. All functions are public. However, it's common practice (across various programming and scripting languages including Bash) to let the names of functions begin with a double underscore if they're intended for private/internal use only.

__foo() {
  # this function is for internal use

bar() {
  # this function is for public use
by (245) 7