Local and global vars

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Anything declared without local is a global variable. In the example below, global_var and local_var are printed with expected values with the former a global variable defined outside the function and the latter a local variable defined inside function greet. another_var is also a global variable because it doesn’t have local declaration, that’s why the value is printed outside the function where it was defined. On the other hand, the value of local_var, a local variable, is not detected.

#!/bin/bash

global_var="ola"

function greet(){
   local local_var="hai"
   echo $local_var

   another_var="salut"
}

echo $global_var
greet
echo $another_var                                                                          
echo "'" $local_var "'" 

➜  ~ ./test1.sh
ola
hai
salut
' '