# Print the string "Hello World"
puts 'Hello World'

# For the string "Hello, Ruby" find the index of "Ruby"
ruby_index = 'Hello, Ruby'.index 'Ruby'
puts "Index of 'Ruby': #{ruby_index}"

# Print your name 10 times
10.times { puts 'Jason' }

# Print the string "This is sentence number X"
(1..10).each { |i| puts "This is sentence number #{i}" }

# Run a ruby program from a file: ruby day1.rb