immutable slice and borrowed slice

src/main.rs

@@ -1,26 +1,9 @@
 fn main() {
-    let mut a: [i8; 10] = [42; 10];
-    a[5] = 0;
-    println!("a: {:?}", a);
+    let a: [i32; 6] = [10, 20, 30, 40, 50, 60];
+    println!("a: {a:?}");
 
-    // so this is assigning an immutable tuple
-    let t: (i8, bool) = (7, true);
-    println!("t 1st: {}", t.0);
-    println!("t 2nd: {}", t.1);
-
-    let pre_ref_x: &mut i32;
-    {
-        let mut x: i32 = 10;
-        let mut z: i32 = 5;
-        println!("x: {x}");
-        println!("z: {z}");
-        let mut ref_x: &mut i32 = &mut x;
-        *ref_x = 20;
-        pre_ref_x = &mut x;
-        println!("x: {x}");
-        ref_x = &mut z;
-        *ref_x = 20;
-        println!("z: {z}");
-    }
-    println!("pre_ref_x: {pre_ref_x}");
+    let s: &[i32] = &a[2..4];
+    println!("s: {s:?}");
+    println!("a[2]: {}", a[2]);
+    println!("s[0]: {}", s[0]);
 }