Introduction:

Crystal is a programming language that resembles Ruby but compiles to native code and tries to be much more efficient, at the cost of disallowing certain dynamic aspects of Ruby.

Installation

1. On Debian and Ubuntu

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curl http://dist.crystal-lang.org/apt/setup.sh | sudo bash
apt-key adv --keyserver keys.gnupg.net --recv-keys 09617FD37CC06B54
echo "deb http://dist.crystal-lang.org/apt crystal main" > /etc/apt/sources.list.d/crystal.list
sudo apt-get install crystal

2. On Mac OSX using Homebrew

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brew tap manastech/crystal
brew install crystal

Hello World

This is the simplest way to write the Hello World program in Crystal:

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puts "Hello World"

First create a file hello.cr containing your code. Then type in the console:

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chmod +x hello.cr
crystal hello.cr

That’s all! Hope you guys love it :D I will have another post about syntax and semantics :) Thanks