Handle parsing errors

guessing_game/src/main.rs

@@ -16,7 +16,14 @@ fn main() {
             .read_line(&mut guess)
             .expect("Failed to read line");
     
-        let guess: u32 = guess.trim().parse().expect("Please type a number!");
+        let guess: u32 = match guess.trim().parse() {
+            Ok(num) => num,
+            Err(_) => {
+                println!("Please type a number!");
+                continue;
+            },
+        };
+
         println!("You guessed: {guess}");
     
         match guess.cmp(&secret_number) {