Bash Shell Scripting For Beginners - Local and Global Variables

In This video I demonstrate the difference between local and global variables in bash, remember bash unlike most other languages has all its variables set to global by default. You can use the "local" flag to make the variable be accessible only by the function call.

******Source Code used in this video******
###local variables stay within the function, and cannot be accessed outside of it, to the rest of the script outside of that functions it's as if the variable doesn't even exist.

##by default all the variables in bash are global variables
function greet_user(){
local name=$1
echo "Hello $name how are you doing?"
}

###when the local flag is set the variable becomes "locked" to that function
#function greet_user(){
# local name=$1
# echo "Hello $name how are you doing?"
#}

name="George"
greet_user Kenny
echo "Hello $name how are you doing?"
#echo "after calling our function"
#echo "Hello $name How are you doing today?"
#echo "Hello $othername"
#greet_user

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[linuxatheist]

I've been looking to get a better understanding of more than just the bare minimum of Bash that I knew already, I was pretty happy to find that you have tutorials on it, you explain things very clearly. These should have more views like your newer videos, hopefully you do more of this kind of thing!

[NayeZen]

Great video man. Really helped me understand.

[limitless]

Cool thank you.
I was surprised to learn that BASH behaves like that.
I mean I assumed that, well if I declare a variable inside a function it must be local...
But I start to see that BASH dosn't play well with my assumptions. BASH is something special... hahha ;)