references

src/main.rs

@@ -7,4 +7,10 @@ fn main() {
     let t: (i8, bool) = (7, true);
     println!("t 1st: {}", t.0);
     println!("t 2nd: {}", t.1);
+
+    let mut x: i32 = 10; 
+    println!("x: {x}");
+    let ref_x: &mut i32 = &mut x;
+    *ref_x = 20; 
+    println!("x: {x}");
 }