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Introduction to the
Parameters of the variable
The return command
Global and local variables, local command
Introduction to the
Functions are snippets of code that can be used over and over again. It differs from aliases in that aliases are suitable for encapsulating simple single commands, whereas functions can encapsulate complex multi-line commands.
Functions are always executed in the current Shell. This is a major difference from scripts. Bash creates a new subshell to execute the script. If the function has the same name as the script, the function is executed first. However, functions take precedence over aliases, that is, if the function has the same name as the alias, the alias takes precedence.
There are two syntax definitions for Bash functions.
# the first
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