started ch9.2

Error Handling.md

@@ -132,3 +132,46 @@ panic = 'abort'
 ```
 
 ## Recoverable Errors
+
+You can use the enum `Result` to handle most errors becasue they are not serious enough to warrant a panic
+
+One example of this of a non serious error is opening a file and that operation fails becasue that file doesnt exist, you may want to create the file instead of terminating the process
+
+the enum `Result` is defined as
+Which has two variants `Ok` and `Err`
+
+```rust
+enum Result<T, E> {
+    Ok(T),
+    Err(E),
+}
+```
+
+`T` and `E` are generic type parameters
+
+`T` reperesents the tpye of value that will be returned in a success case within th `Ok` variant
+`E` reperesents the tpye of the error that will be returned in a failure case within the `Err` variant
+
+Because `Result` has these generic type parameters we can use the `Result` type and the functions defined on it in many different situations where the success value and error value we want to reutrn may differ
+
+Lets use a function that retunrs a `Result` value because the function could fail
+
+```rust
+use std::fs::File;
+
+fn main () {
+    let greeting_file_result = File::open("hello.txt");
+}
+```
+
+The return type of `File::open` is a `Result<T, E>`
+The generic parameter `T` has been filled in by the implementation of `File::open` with the type of the success value is a file handle (`std::fs::File`)
+The `E` parameter is used in the error value which is `std::io::Error`
+
+This return type indicates that call may succeed and reutnr a file handle that we can read and write to or it may fail if it doesnt exist, or not having the correct permissions
+
+`File::open` function needs a way to tell us whether it succeeded or failed hence the use of `Result` enum which conveys this message of failure or success
+
+When `File::open` succeeds, the value in `greeting_file_result` will be an instance of `Ok` that contains a file handle
+When it fails the value in `greeting_file_result` will be an intance of `Er` that contains mroe info about the kind o error that occurred
+

RustBrock.code-workspace

@@ -0,0 +1,17 @@
+{
+	"folders": [
+		{
+			"path": "."
+		}
+	],
+	"settings": {
+		"[markdown]": {
+			"editor.quickSuggestions": {
+				"other": false,  // Disable other suggestions
+				"comments": false,
+				"strings": true  // Enable suggestions for strings (including links)
+			},
+			"editor.suggestOnTriggerCharacters": true  // Keep suggestion on trigger characters (like '[' for links)
+		}
+	}
+}