Vec

implements , which means that you can call slice methods on a Vec.

• Vec is a type of collection, along with String and HashMap. The data it contains is stored on the heap. This means the amount of data doesn’t need to be known at compile time. It can grow or shrink at runtime.
• vec![...] is a canonical macro to use instead of and it supports adding initial elements to the vector.
• Show iterating over a vector and mutating the value: for e in &mut v { *e += 50; }