Rust Taskbook Level 5.9

Display the following pyramid on the screen:

Make an array of size 10 by 10. Fill it with numbers in order:

rust[
  [ 1,  2,  3,  4,  5],
  [ 6,  7,  8,  9, 10],
  [11, 12, 13, 14, 15],
  [16, 17, 18, 19, 20],
  [21, 22, 23, 24, 25],
}

Given a number:

rustlet num: u16 = 12345;

Double the digits in this number:

rust1122334455

Given an array:

rust[
  "123",
  "213",
  "321",
}

Replace the characters "1" with "0" in each line:

rust[
  "023",
  "203",
  "320",
}