Learning Ruby - Part I

In continuation with previous post Ruby Getting Started we will look at examples for loop, multiplication tables, File I/O operations. I am referring to Beginning Ruby by Peter Cooper for learning Ruby Programming Syntax

Example program multiple.rb

x = 1;

#Example 1 - Multiplication using 10.times;
puts "From 1 to 10 Multiplication of 5";
10.times do
       a = x*5;
       puts a;
       x = x+1;
end;
#Example 2 - Loop using upto;
puts "From 10 to 20 Multiplication of 5";
1.upto(10) do
       a = x*5;
       puts a;
       x = x+1;
end;
puts "Arrays"
#Example 3 - Arrays list all elements;
arrayA = [1,2,3,4,5];
arrayA.each {|y| puts y};
puts "Array & Strings"
arrayB = [1,2,"One","Two","Three"];
arrayB.each {|y| puts y};
#Example 4 - List the program line by Line;
File.open("d:\multiply.rb").each { |line| puts line }

 

 

Happy Learning!!! 

Ruby Getting Started

This post is about learning ruby. Tried it online using rubyfiddle. rubbyfiddle did not work with global variables i.e Variables using $ symbol.

Basic Commands

Very Usual Hello World Example

Dynamic Typing

Global variables didn't work using ruby fiddle. Installed ruby for Windows. Using Interactive Ruby Option under Programs->Ruby tried below examples

While Loop

Next example is trying out for loop. Below is the test file

Start Command Prompt with Ruby. Run the test file

Pretty easy to learn. Looking forward for more interesting posts.

More Reads
Ruby Tutorial with Code Samples
A Wealth Of Ruby Loops And Iterators
Ruby Procs And Lambdas (And The Difference Between Them)
A Unit Testing Framework In 44 Lines Of Ruby


Happy Learning!!!