loop and break

guessing_game/src/main.rs

@@ -17,26 +17,33 @@ fn main() {
     let mut guess = String::new();
     // could still call this without importing it via std::io::stdin
     // this can be one line, it is broken up for readability.
-    io::stdin()
+    loop {
-        // & indicates that this argument is a reference,
+        io::stdin()
-        // references are also immutable by default so &mut is needed
+            // & indicates that this argument is a reference,
-        .read_line(&mut guess)
+            // references are also immutable by default so &mut is needed
-        // expect handles the Err variant by crashing the program. There are other ways to handle
+            .read_line(&mut guess)
-        // errors.
+            // expect handles the Err variant by crashing the program. There are other ways to handle
-        .expect("Failed to read line");
+            // errors.
-    // read_line returns a `result` value. result is an enum. Each possible state is a variant.
+            .expect("Failed to read line");
-    // Result's variants are Ok and Err
+        // read_line returns a `result` value. result is an enum. Each possible state is a variant.
+        // Result's variants are Ok and Err
 
-    // shadowing V
+        // shadowing V
-    let guess: u32 = guess.trim().parse().expect("please type a number for the love of god");
+        let guess: u32 = guess.trim().parse().expect("please type a number for the love of god");
-    // trim removes space and \n
+        // trim removes space and \n
-    println!("you guessed: {guess}");
+        // single colon is type annotation
-    // a match expression is made of arms. an arm is a pattern to match and code to run against it.
+        //
-    // switch/case
+        println!("you guessed: {guess}");
-    match guess.cmp(&secret_number) {
+        // a match expression is made of arms. an arm is a pattern to match and code to run against it.
-        Ordering::Less => println!("too small"),
+        // switch/case
-        Ordering::Greater => println!("too big"),
+        match guess.cmp(&secret_number) {
-        Ordering::Equal => println!("you win"),
+            Ordering::Less => println!("too small"),
+            Ordering::Greater => println!("too big"),
+            Ordering::Equal => {
+                println!("you win");
+                break;
+            }
+        }
     }
 }
 // cargo doc --open