diff --git a/rustbyexample/.gitignore b/rustbyexample/.gitignore
index 7b8f48a..e7da779 100644
--- a/rustbyexample/.gitignore
+++ b/rustbyexample/.gitignore
@@ -1 +1,2 @@
 /hello/hello
+/hello/print
diff --git a/rustbyexample/hello/print.rs b/rustbyexample/hello/print.rs
index de38bfa..d81ba7a 100644
--- a/rustbyexample/hello/print.rs
+++ b/rustbyexample/hello/print.rs
@@ -14,10 +14,14 @@ fn main() {
 
     println!("{number:>0width$}", number=1, width=6);
 
-    println!("My name is {0}, {1} {0}", "Bond");
+    println!("My name is {0}, {1} {0}", "Bond", "James");
 
     #[allow(dead_code)]
+    #[derive(Debug)]
     struct Structure(i32);
 
-    println!("This struct `{}` won't print...", Structure(3));
+    println!("This struct `{:?}` will print...", Structure(3));
+
+    let pi = 3.141592;
+    println!("Pi is roughly {:.3}", pi);
 }