Just a few things about Bash variables.

Every variable in Bash is global and are accessible anywhere in the script.

They can be used in a function, loop, or conditional statement within the script.

<pre lang="bash">
# setting a variable
a = "hello"
# printing a variable
echo $a
# using a variable inside a function
hello_function () {
  echo $a
# passing a variable to a function
hello_function $a