Array types
Syntax
ArrayType :
[
Type;
Expression]
An array is a fixed-size sequence of N
elements of type T
. The array type
is written as [T; N]
. The size is an expression that evaluates to a
usize
.
Examples:
#![allow(unused_variables)]
fn main() {
// A stack-allocated array
let array: [i32; 3] = [1, 2, 3];
// A heap-allocated array, coerced to a slice
let boxed_array: Box<[i32]> = Box::new([1, 2, 3]);
}
All elements of arrays are always initialized, and access to an array is always bounds-checked in safe methods and operators.
Note: The
Vec<T>
standard library type provides a heap-allocated resizable array type.