feat: iterating over vector values

Signed-off-by: Fredrik Klingenberg <[email protected]>

projects/collections/src/main.rs

@@ -10,14 +10,27 @@ fn main() {
     v.push(7);
     v.push(8);
 
-    let e = vec![1, 2, 3, 4, 5];
-    let third = &e[2];
+    let v = vec![1, 2, 3, 4, 5];
+    let third = &v[2];
     // e.push(6); // Changing e to mutable (mut) and uncommenting this line will cause an error because we are trying to borrow a mutable reference to e while we have an immutable reference to e
     println!("The third element is {}", third);
 
-    let third = e.get(2); // The reson why this is option is because it might not exist, the index might be out of bounds
+    let third = v.get(2); // The reson why this is option is because it might not exist, the index might be out of bounds
     match third {
         Some(third) => println!("The third element is {}", third),
         None => println!("There is no third element"),
     }
+
+    for i in &v {
+        println!("{i}")
+    }
+
+    let mut v = vec![100, 32, 57];
+    for i in &mut v {
+        *i += 50; // Dereference i to get the value it refers to, then add 50 to that value
+    }
+
+    for i in &v {
+        println!("{i}")
+    }
 }