Size in Rust 1.55

In Rust 1.55, you can get the size of an array using the len() method.

Here is an example code that shows how to get the size of an array in Rust:

fn main() {
    let arr = [1, 2, 3, 4, 5];
    let size = arr.len();
    println!("The size of the array is: {}", size);
}

In this example, we initialize an array of size 5, and then call the len() method on it to get its size. The len() method returns the number of elements in the array, which in this case is 5. We then print the size of the array to the console.

Output:

The size of the array is: 5

You can use the len() method on arrays of any type in Rust to get their size. Just replace arr with your array name in the example code above.