Language Introduction

This course is targeted at novice Crystal programmers and conveys a basic understanding of the language's core concepts. Prior programming experience is recommended, but not required. This course can help you learn your first programming language.

Contents:

Hello World – A simple program that prints a famous first message
Variables – Introduction to variables and assignments
Math – Basic numbers and algebra
Strings – Examples on how to modify strings
Control Flow – How to structure a program with conditionals and loops
Methods – Introduction to methods, arguments and type restrictions

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https://crystal-lang.org/reference/tutorials/basics/index.html