Week 1, Day 1 HW

week1_day1.rb

#TEMPERATURE CONVERTER

puts "Type 1 to convert from Celsius to Fahrenheit"
puts "Type 2 to convert from Fahrenheit to Celsius"
convertor = gets.chomp

if convertor == "1"
	puts "Enter temperature in Celsius: "
	temp1 = gets.chomp.to_i
	temp1 = ((temp1 * 9) / 5) + 32
	puts "The temperature in Fahrenheit is: #{temp1}"
elsif convertor == "2"
	puts "Enter temperature in Fahrenheit: "
	temp2 = gets.chomp.to_i
	temp2 = ((temp2 - 32) * 5) / 9
	puts "The temperature in Celsius is: #{temp2}"
end

###########################################################

#GUESSING GAME

i = rand(1..100)
	puts "Guess a number between 1 and 100: "
	tries = 0
	guess = gets.chomp.to_i
	

until i == guess
		if i > guess
			puts "The number is higher than #{guess}. Guess again: "
		elsif i < guess
			puts "The number is lower than #{guess}. Guess again: "
		else i == guess
			puts "You guessed it in #{tries + 1} tries!"
		end
	guess = gets.chomp.to_i
	tries += 1
end

	puts "Congrats! You guessed it in #{tries + 1}!"

#########################################################

#SIMPLE ASCII ART

puts "How many rows do you want your pyramid to have? (up to 100) "
n = gets.chomp.to_i
rows = 0
stars = 1
spaces = (100 - stars) / 2

until n == rows
	puts (" " * spaces) + ("*" * stars)
	stars += 2
	spaces -= 1
	rows += 1
end

#########################################################

# REVERSE A STRING, IN PLACE, without using .reverse (use loops!)

puts "Enter a string: "
string = gets.chomp

loop = string.length
  word = ''
  while loop > 0
    loop -= 1
    word += string[loop]
  end  

puts word

#########################################################

# MULTIPLICATION TABLE
# 9 x 9 multiplication table, with even spacing

puts "A multiplication table: "
puts

for row_number in 1..9
  line = "#{row_number}|  "
  for column_number in 1..9 
      line += "#{row_number * column_number}\t"
  end
  
  puts line
end

#this explains it! http://ruby.bastardsbook.com/chapters/loops/