Merge pull request #115 from msaf9/master

Temperature conversions algorithm

conversions/temperature_conversions.rb

@@ -0,0 +1,72 @@
+# A ruby program for temperature conversions
+
+module TemperatureConversion
+  # celsius -> kelvin = value of celsius + 273.15 => K
+  def self.celsius_to_kelvin(celsius_input)
+    kelvin_output = (celsius_input + 273.15).round(2)
+    puts "#{celsius_input}°C = #{kelvin_output}K"
+  rescue
+    puts "Error: Please provide number only!"
+  end
+
+  # kelvin -> celsius = vale of kelvin - 273.15 => °C
+  def self.kelvin_to_celsius(kelvin_input)
+    celsius_output = (kelvin_input - 273.15).round(2)
+    puts "#{kelvin_input}K = #{celsius_output}°C"
+  rescue
+    puts "Error: Please provide number only!"
+  end
+
+  # celsius -> fahrenheit = (value of celsius * 9 / 5) + 32 => °F
+  def self.celsius_to_fahrenheit(celsius_input)
+    fahrenheit_output = ((celsius_input * 9 / 5) + 32).round(2)
+    puts "#{celsius_input}°C = #{fahrenheit_output}°F"
+  rescue
+    puts "Error: Please provide number only!"
+  end
+
+  # fahrenheit -> celsius = (value of fahrenheit - 32) * 5 / 9 => °C
+  def self.fahrenheit_to_celsius(fahrenheit_input)
+    celsius_output = ((fahrenheit_input - 32) * 5 / 9).round(2)
+    puts "#{fahrenheit_input}°F = #{celsius_output}°C"
+  rescue
+    puts "Error: Please provide number only!"
+  end
+
+  # fahrenheit -> kelvin = [(value of fahrenheit - 32) * 5 / 9] + 273.15 => K
+  def self.fahrenheit_to_kelvin(fahrenheit_input)
+    kelvin_output = ((fahrenheit_input - 32) * 5 / 9).round(2).round(2)
+    puts "#{fahrenheit_input}°F = #{kelvin_output}K"
+  rescue
+    puts "Error: Please provide number only!"
+  end
+
+  # kelvin -> fahrenheit = [(value of kelvin - 32) * 5 / 9] + 273.15 => K
+  def self.kelvin_to_fahrenheit(kelvin_input)
+    fahrenheit_output = (((kelvin_input - 273.15) * 9 / 5) + 32).round(2).round(2)
+    puts "#{kelvin_input}K = #{fahrenheit_output}°F"
+  rescue
+    puts "Error: Please provide number only!"
+  end
+end
+
+# celsius <-> kelvin
+TemperatureConversion.celsius_to_kelvin(20)
+TemperatureConversion.kelvin_to_celsius(20)
+
+# Invalid input
+TemperatureConversion.kelvin_to_celsius("a")
+
+# celsius <-> fahrenheit
+TemperatureConversion.celsius_to_fahrenheit(-20)
+TemperatureConversion.fahrenheit_to_celsius(68)
+
+# Invalid input
+TemperatureConversion.celsius_to_fahrenheit("abc")
+
+# fahrenheit <-> kelvin
+TemperatureConversion.fahrenheit_to_kelvin(60)
+TemperatureConversion.kelvin_to_fahrenheit(-60)
+
+# Invalid input
+TemperatureConversion.fahrenheit_to_kelvin("60")