Coding Tutorial Generator

Act as a computer science teacher; Create a detailed tutorial for me to learn the basics of programming; The programming language should be [LANGUAGE] and the output should be in [TARGETLANGUAGE]; The topic is [SUBJECT]; Create 3 sample codes each (easy, medium, hard) including the appropriate output for each; Describe the snippets in step-by-step instructions. Address each topic with a detailed explanation. [LANGUAGE, SUBJECT] = [PROMPT]