RubyRuby CompilerRuby Online Compilerv3.0.1

puts "Hello, World!"

print "Enter your name: "
name = gets.chomp
puts "Hello, #{name}!"

fruits = ["apple", "banana", "cherry"]
fruits.each_with_index do |fruit, i|
  puts "#{i + 1}: #{fruit}"
end

def factorial(n)
  (1..n).reduce(1, :*)
end

puts factorial(5)

begin
  n = Integer("abc")
  puts n
rescue ArgumentError => e
  puts "Invalid number: #{e.message}"
ensure
  puts "Done"
end

counts = Hash.new(0)
"banana".each_char { |ch| counts[ch] += 1 }
counts.each { |ch, n| puts "#{ch}: #{n}" }

s = "  Hello, World  "
puts s.strip.upcase
puts s.strip.split(", ").inspect
puts [3, 1, 2].sort.inspect

class Person
  attr_reader :name, :age
  def initialize(name, age)
    @name = name
    @age = age
  end
  def describe
    "#{@name} (#{@age})"
  end
end

puts Person.new("Ada", 36).describe

nums = [1, 2, 3, 4, 5]
evens = nums.select { |n| n.even? }
doubled = evens.map { |n| n * 2 }
p doubled
puts "Sum: #{nums.sum}"

words = ["pear", "apple", "fig"]
sorted = words.sort_by(&:length)
p sorted
puts words.max_by(&:length)