Hello, World! Algorithm Tutorial

Your First Program

A "Hello, World!" program is the simplest program you can write in any language. It outputs text to the screen and verifies your development environment works correctly.

Your programming journey starts here. You call a print function with a string argument. The string must match exactly what the problem asks for.

print("Hello, World!")

If you can't produce exact output, you'll get Wrong Answer on problems that check character by character. Trailing spaces, wrong capitalization, or missing punctuation all cause failures.

Applications: You use output functions for debugging, logging, user feedback, and command-line tools.

Time complexity: $O(1)$ because you perform a single operation.

Space complexity: $O(1)$ because you store only the output string.