In Bash shell scripting, functions are ways to group the set of instructions together to get a specific outcome. You can think of functions as a mini script. Functions are also called procedures and methods in some programming languages. Functions are a great way to achieve modularity and reusability. And especially so if you define your functions in one script file, and import those into other script files. This is similar to import statements in python, include statements in C, etc.
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Bash Scripting - Functions Explained With Examples - OSTechNix#
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This guide explains what are Bash functions and how to define and call a function in Bash scripts with examples.
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