Merge pull request #95 from lordgareth10/master

Update UG

docs/UserGuide.md

@@ -8,7 +8,7 @@ the tracking and management objectives can be achieved more efficiently.
 #### Target user and value proposition
 BookBuddy targets people who are comfortable and proficient with using command-line-interfaces(CLI). These users 
 typically prefers the efficiency and flexibility of CLI environments over Graphical user Interfaces (GUIs). They are 
-likely to be avid readers who read multiple books simultaneously and need an effective way to organise their reading 
+likely to be avid readers who read multiple books simultaneously and who need an effective way to organise their reading 
 lists.
 
 Therefore, BookBuddy offers a streamlined and efficient solution for tracking and managing reading lists directly from 
@@ -94,7 +94,7 @@ remember to read it soon....
 ````
 
 ### Removing a book: `remove`
-Removes a specific book from the book list.
+Removes a specific book from the book list by its index.
 
 Format: `remove [BOOK_INDEX]`
 
@@ -164,7 +164,7 @@ Successfully marked Harry Potter as unread.
 
 ### Setting the genre of a book: `set-genre`
 
-Sets the genre of a specific book based on the provided input.
+Sets the genre of a specific book based on the provided input and the provided index.
 
 Format: `set-genre [BOOK_INDEX]` followed by `[NUMBER]` then `[CUSTOM_GENRE]` if 6 is entered
 in the previous step
@@ -216,7 +216,7 @@ Genre set to Fiction for book at index 1
 
 ### Labelling a book: `label`
 
-Sets the label of a specific book to the provided input.
+Sets the label of a specific book to the provided input by its index.
 
 Format: `label [BOOK_INDEX] [LABEL]`
 
@@ -411,7 +411,13 @@ Thank you for using BookBuddy! Hope to see you again keke :)
 
 **A**: All data entered is automatically saved by the program and does not require any
 commands from the user. Upon running the file for the first time, the `books.txt` file
-will be created in the `data` folder. This folder will be in the same folder as the JAR file.
+will be created in the `data` folder. This folder will be in the same folder as the JAR file (For example, if
+JAR file is located in /Users/ZongYao/Desktop then the `books.txt` will be located in /Users/ZongYao/Desktop/data).
+
+**Q**: What happens if I give an invalid command or command argument?
+
+**A**: All invalid commands and invalid arguments are handled gracefully with exceptions. You will just
+be prompted to re-enter the command with an instruction on how to properly type the command.
 
 **Users MUST exit the program with the `bye` command for the data in the session
 to be saved.**