How to convert a string to lower or upper case in Ruby?

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In Ruby, you can easily convert a string to lowercase or uppercase using the downcase and upcase methods, respectively. Here's how you can do it with examples:

  1. Converting to lowercase using the downcase method:
ruby
original_string = "Hello, World!"
lowercase_string = original_string.downcase

puts "Original: #{original_string}"
puts "Lowercase: #{lowercase_string}"

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