for range over the array, rather than index

src/main.rs

@@ -3,12 +3,9 @@ fn main() {
     let x: i8 = 15;
     let y: i16 = 1000;
 
-    for i in 0..3 {
-        println!("a[{i}]: {}", a[i]);
-        println!(
-            "a[{i}] * x * y = {}",
-            multiply(a[i].into(), x.into(), y.into())
-        );
+    for i in a {
+        println!("{}", i);
+        println!("i * x * y = {}", multiply(i.into(), x.into(), y.into()));
     }
 }