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Rust Taskbook Level 2.1

Explain the difference between the loop loop and the while loop.

Given an array of integers:

let arr = [1, 2, 3, 4, 5];

Print to the console the number of elements in this array.

Given an array of integers:

let arr = [1, 2, 3, 4, 5];

Print the elements of this array to the console.

Given an array of strings:

let arr = ["123", "456", "789"];

Print the first characters of each element of this array to the console.

Given some integer:

let num: u16 = 12345;

Find the sum of all its even digits.

Given some integer:

let num: u8 = 12;

Find the factorial of this number.

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