How to Use the Ruby Compiler

To use the Ruby Compiler, follow these steps:

  1. Navigate to the Ruby Compiler webpage.
  2. In the code editor, write your Ruby code.
  3. Click the "RUN" button to compile and run your code.
  4. The output will be displayed in the console below the code editor.

Taking Inputs

In Ruby, you can take inputs from the user in various ways. Here are some examples:

String Input

puts "Enter a string:"
input = gets.chomp
puts "You entered: #{input}"

Number Input

puts "Enter a number:"
num = gets.chomp.to_i
puts "You entered: #{num}"

Importing Libraries

Ruby has a rich set of built-in libraries that can be used in your programs. Here are some examples:

Using the Math Library

result = Math.sqrt(25)
puts "Square root of 25 is #{result}"

Using the Array Class

arr = [1, 2, 3, 4, 5]
puts "Array: #{arr}"

Syntax 101

Ruby is a high-level, interpreted, general-purpose programming language. Here's a primer on the major syntax basics of Ruby:


Variables in Ruby can be either local, instance (@), class (@@), or global ($).

name = "John Doe" # Local variable
@age = 25 # Instance variable

Control Structures

Ruby includes control structures such as if, else, for, while, and case.

# If-Else
if @age > 18
    puts "Adult"
    puts "Minor"

# For loop
for i in 0...5
    puts i

# Case
case day
when "Monday"
    puts "Start of the work week"
when "Friday"
    puts "End of the work week"
    puts "Midweek"


Functions in Ruby are called methods and are defined with the def keyword.

def greet(name)
    puts "Hello, #{name}"

greet("John Doe") # Calls the method with "John Doe" as the argument

Ruby Online Test

A Ruby online test is an effective way to assess an individual's Ruby programming skills. These tests typically include a mix of theoretical questions and practical coding challenges. By attempting these tests, candidates can demonstrate their understanding of Ruby concepts, their problem-solving abilities, and their proficiency in writing efficient code. Ruby online tests are commonly used in technical interviews, coding bootcamps, and online learning platforms to gauge a learner's understanding and proficiency in Ruby.