diff --git a/what-is-a-variable/hello_variable b/what-is-a-variable/hello_variable
index 89ae6a1..3a24a18 100644
--- a/what-is-a-variable/hello_variable
+++ b/what-is-a-variable/hello_variable
@@ -2,4 +2,11 @@
 
 # Welcome to your first Bash Script
 
-echo 'Hello World!'
\ No newline at end of file
+#there are mainly 2 types of variables used here: 1)local variables 2)system variables
+# 1)local variables: these variables are made by the user for program and these have some limitation to use these variables.
+        name='microsoft'
+        echo $name
+# 2)system variables: these variables are predefined variables and can't change according to the usage.eg:$BASH,$BASH_VERSION,$HOME,$PWD
+      echo $BASH
+      echo $BASH_VERSION
+