logic.rb

# write an expression that returns true by using ==
2 == 1 + 1

# write an expression that returns false using ==
2 == 1 + 3

# write an expression that returns true using !=
1 != 2

# write an expression that returns false using !=
2 != 2

# Write an if statement with 3 different branches
#   use != in the first branch, == in the second, and > in the third

my_age = 30
if my_age != 30 && my_age < 30 
  puts "You have your whole life ahead of you."
elsif my_age == 30
  puts "Learn to love."
else my_age > 30
  puts "With age comes wisdom."
end

# Assign a variable based on the result of an if statement

you_spend = 51
if you_spend > 50
  puts "You're eligible for a discount!"
  discount = 5
else puts "Keep spending"
end

# Execute code based on the result of an if statement.
#   conditionally run puts "Hello Class" if 1 < 2

def execution(x)
  if x < 2
    puts "Hello Class"
  end
end

execution(1)

# Try using an if statement at the end of an expression

number_of_coconut_waters = 10; puts "life is good" if number_of_coconut_waters == 10

# Write an if statement that negates the or operator to return true

if !(!true || !true)
  puts "If it aint false and rhymes with blue, it must be... correct."
end

# Write an if statement that uses the and operator to create a false return

if (true && false)
  puts "Falsetto"
else puts "Falsetto is not the same as false."
end

# Write a Case Statement that checks if a variable is a vowel

letter = "a"
case letter
when "a", "e", "i", "o", "u", "y"
  puts "That letter #{letter} a vowel, baby."
else
  puts "Ugh, yet another consonent."
end

    # why doesn't this below work?

    print "Type in a letter:"
    letter = gets.chomp
    case letter
    when "a", "e", "i", "o", "u"
      puts "That letter #{letter} a vowel, baby."
    else
      puts "Ugh, yet another consonent."
    end

# Rewrite that same case statement as an if statement

letter = "a"
if (["a", "e", "i", "o", "u"].include?(letter))
  puts "That letter a vowel, baby."
else puts "Ugh, a consonent."
end
    
# Write a Case statement that has at 4 branches and a default return 

dinner = "steamed vegetables"
case dinner
  when "pizza"
    puts "I'm super jelly you're eating pizza."
  when "spaghetti & meatballs"
    puts "Damn, enjoy your meal."
  when "penne pasta"
    puts "One of my favs."
  when "steamed vegetables"
    puts "At least you're being healthy."
  else
    puts "You're not eating dinner!?"
end

# Assignment
# Write a while loop that runs exactly 5 times

count = 1
while count <= 5
  puts "How many fingers? Let's see, I count " + count.to_s + " fingers."
  count += 1
end


# Write a while loop that counts from 1 to 10 and puts all odd numbers
# => you can check if a number is odd by calling the odd? method on it.
# => 1.odd? will return true

count = 1
while count <= 10
  if count.odd?
    puts count.to_s + " is an odd number."
  end
  count +=1
end