Here is Day 0 hello world solution in python, java, c++, c and javascript - https://programmingoneonone.com/hackerrank-day-0-hello-world-30-days-of-code-solution.html

those using python:

input_string=input() print('Hello, World.') print(input_string) #this is so that the output will be based on input, clears the hidden task

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.