Arrays

NOTE: Arrays are covered in chapter 3 of The Rust Book. I'm putting them later based off the sentence "If you're unsure whether to use an array or a vector, chances are you should use a vector.

Arrays are like tuples. They're containers that hold a collection of values. Arrays are different from tuples in two ways:

  1. Every value the contain must be of the same type.

  2. The number of items in an array is set when the array is created and cannot be changed.

Arrays are created with square brackets. The format the defines them is the type followed by a semicolon then the number of items in the array. The format looks like this for an array of three integers.

let alfa: [i32, 3] = [3, 5, 7];

Accessing the elements of an array is done using the name of the array followed by the desired values index number surrounded by square brackets.

println!("Value {}", alfa[0]);

Putting those parts together we get

SOURCE CODE

fn main() {

  let alfa: [i32; 3] = [3, 5, 7];

  println!("1st {}", alfa[0]);
  println!("2nd {}", alfa[1]);
  println!("3rd {}", alfa[2]);

}

CODE RUNNER