Rust Taskbook Level 5.2

Ask the user to enter 10 numbers via the console. Fill the array with these numbers.

Given an array:

rustlet arr: [[i8; 3]; 3] = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9],
];

Find the sum of the elements of this array.

Given an array of integers:

rustlet arr = [100, 200, 300, 400, 500];

Write into a vector the elements of this array whose first digit is equal to 1 or 2.

Given an array of integers:

rustint arr = [123, 987, 345, 567];

Get the second element, which contains the digit 3:

rust345

The following motorcade was given:

rustlet tpl = (2025, 12, 31);

Print the data of this tuple as the following string:

rust"2025-12-31"

Write a program that will output the following pyramid to the console: