functions

[Supervisor]

The big advantage using functions is using them multiple times, but only writing the code once
Remember that functions always have to precede "normal" code.
There are two different ways you can use functions in bash:

1. function function_name {
   command...
   }
2. function_name (){
   command...
   }

I always use the second one, but this is up to you. Another thing which come in handy is to call scripts with parameters, so functin_name foo will call the function with the parameter $1=foo. Example:

#!/bin/bash
foo="1"
foobar (){
printf "variable foo is \"$foo\""
if [ -n "$1" ]
then printf " and you called this function with \$1=\"$1\".\n"
else printf " and you did not call this function with a variable. Why didn't you do that? It would have been funny :(\n"
fi
}
printf "Type \"foobar variable\":   "
read -r answer
$answer
exit