Update bash-9-scripting.md

docs/pages/bash/bash-9-scripting.md

@@ -56,18 +56,21 @@ When it will come the time to write scripts, you will have to use it extensively
     echo $file_count
     ```
 
-!!! question "Write a bash script called `count3.sh` that takes as an argument a directory name and count the number of files contained"
+!!! question "Write a bash script called `count3.sh` that takes as an argument a directory name and count the number of files contained, after checking that the directory exists"
 
 ??? example "Click to show the solution"
     ```bash
     #!/bin/bash
 
     # directory variable
-    directory=/home/<user_name>/training_unix_basics/data
+    directory=$1
 
+    if [ -d "$directory" ]; then
     # count the number of files
-    file_count=$(ls -1 "$directory" | wc -l)
+     file_count=$(ls -1 "$directory" | wc -l)
+     echo "Directory '$directory' contains $file_count files."
+    else
+      echo "Directory '$directory' does not exist."
+    fi
 
-    # display the result
-    echo $file_count
     ```
\ No newline at end of file