String buffer and immutable ref to a string slice

src/main.rs

@@ -1,9 +1,10 @@
 fn main() {
-    let a: [i32; 6] = [10, 20, 30, 40, 50, 60];
-    println!("a: {a:?}");
+    let s1: &str = "Hello";
+    println!("s1: {s1}");
 
-    let s: &[i32] = &a[2..4];
-    println!("s: {s:?}");
-    println!("a[2]: {}", a[2]);
-    println!("s[0]: {}", s[0]);
+    let mut s2: String = String::from("Hello");
+    println!("s2: {s2}");
+
+    s2.push_str(s1);
+    println!("s2: {s2}");
 }