src/main.rs

@@ -1,23 +1,22 @@
-use  rand::Rng;
+use rand::Rng;
 fn main() {
-    let mut number:i128 = 0;
+    let mut number: i128 = 0;
     loop {
-        let rng:i128 = rand::thread_rng().gen_range(1..=1000000000000000000000000);
+        let rng: i128 = rand::thread_rng().gen_range(1..=1000000000000000000000000);
         println!("Do you want to add {} to the number", rng);
         println!("Your number is {}(y/n)", number);
         let mut input: String = String::new();
-        std::io::stdin().read_line(&mut input).expect("Failed to read line");
-        let input: String = input.trim().parse().unwrap();
-        let yes:String = String::from("y");
-        let no = String::from("n");
-        if input == yes {
-            let number = number+=rng;
-        }
-        else if input == no {
-            println!("maby the next number");
-        }
-        else {
-            println!("Invalid input");
+        std::io::stdin()
+            .read_line(&mut input)
+            .expect("Failed to read line");
+        let input = input.trim(); // Parse is for numbers we use letters here. A &str is more usefull in this case as we dont want to mutate  it
+        match input { // Match is a better way then chaining if/else expressions.
+            "y" => number += rng, // let expression would have shadowed the original variable and would have droped to soon. Use add assign insted
+            "n" => continue,
+            _ => {
+                println!("Option unknown")
+            }
         }
     }
-}
+}
+