program.rb

puts "hello"
p "hello"

my_name = "Catharina"
greeting("Catharina")

def greeting(name)# here we define a method called "greeting" and an argument "name" within a parentheses.
    p "hello " + "" + name
end #closing method

greeting(my_name)


def greeting#here we define a method called "greeting"
    puts "Please enter your name:"
    name = gets.chomp#here is where the inside the method
    puts "Hello" + " " + name
  end#closing method

greeting

program2.rb

if true
    puts "this is true"
else 
    puts "this is false"
end  

program3.rb

def choose
    puts "Do you like programming? Yes, no, or maybe please."
    choice = gets.chomp
    case choice.downcase
    when "yes"
      puts "That\'s great!"
    when "no"
      puts "That\'s too bad!"
    when "maybe"
      puts "Glad you are giving it a chance!"
    else
      puts "I have no idea what that means."
    end
end  

choose

program4.rb

=begin
3.times do
    puts "Hello"
end
=end

number = 0
=begin
while (number <= 10) do # while this condition is true, do...
  p "the number is now #{number}" # whatever is in this code block
  number += 1 # short for number = number + 1
end # don’t forget your end
=end
(0..10).each do |n|
    p "the new number is #{n}"
end