Suppose we have a bunch of alien creatures to populate a game level, then we probably want to store their names in a handy list. Rust's array is just what we need:
// from Chapter 4/code/arrays.rs
let aliens = ["Cherfer", "Fynock", "Shirack", "Zuxu"];
println!("{:?}", aliens); To make an array, separate the different items by commas and surround the whole with [ ] (rectangular brackets). All items must be of the same type. Such an array is of fixed size (it must be known at compile time) and cannot be changed; it is stored in one contiguous piece of memory in stack memory.
If the items have to be modifiable, declare your array with let mut; however even then the number of items cannot change:
let mut aliens = ["Cherfer", "Fynock", "Shirack", "Zuxu"];
The array aliens could be type annotated as [&str; 4], where the first parameter is the type of the items, and the second is their number.
let aliens: [&str; 4] = ["Cherfer", "Fynock", "Shirack", "Zuxu"];
If...