i don't understaand this tutorial is there anyone can define this for me honestly because i want to improve my python skill

For you to past the tests, the "Hello, World" should end with a fullstop like this "Hello, World."

Just use a scanner to read stream then print boath hello word and the line.

print("hello! world"

How do you solve this challenge? When I submit my code, it remains "unsolved" but it gave me full credit under the submissions tab.