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How to write a simple program: "Hello World"

Hello World

https://pixabay.com/static/uploads/photo/2016/05/02/01/32/barbie-1366378_960_720.jpg

Hello world is a small, simple program that is used to demonstrate the syntax of a programming language.

Ruby


http://i.imgur.com/VG0sp1O.png

If you read my last post, I recommended ruby. That will be the programming language we'll be using to write our simple program. You can download ruby here for any platform:
https://www.ruby-lang.org/en/downloads/

The Program

http://i.imgur.com/7aAhti4.jpg
Here is the entire “Hello World” program written in ruby:

puts “Hello World”

If you saved that snippet as hello_world.rb (a ruby file), and ran it in your terminal(or command prompt on windows), it would look like this:

ruby hello_world.rb
Hello World

the first line in the above snippet is running the program hello_world.rb, and the second line is the output from the program, in this case, it is printing Hello World.

Demo

http://i.imgur.com/pyVURiU.png
I made a gif showing me writing this program from the start, I’m using vim as the text editor to write the ruby file, save it, then run it with the same commands I used above:
http://i.imgur.com/TyK7CSV.gif


That’s it! First Program Written. We're all programmers now.

A bit about me

I've been learning about programming for at least a decade, and I probably won't stop. You can check out my intro post and some of the projects I've worked on:

https://steemit.com/introduceyourself/@superfreek/a-developer-introduction-post

And my last post "How to become a self-taught programmer":

https://steemit.com/tag/@superfreek/how-to-become-a-self-taught-programmer

30 upvotes $0.08

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