Playing with stack and heap copying

rustbook/ownership/src/main.rs

@@ -1,4 +1,9 @@
 fn main() {
+    let x = 5;
+    let y = x;
+
+    println!("x = {}, y = {}", x, y);
+
     let s1 = String::from("hello");
     let s2 = s1.clone();