Conditional expressions in Ruby language

rubyConditionals1.rb

# Temperature Converter
#
print "How many degrees is the temperature right now? "

degrees = gets.chomp().to_f
 
print "Fahrenheit(F) or Celsius(C)? "
 
unit = gets.chomp().to_s
 
convertC = (degrees * 9)/5 + 32 
convertF = (degrees - 32) * 5 / 9

if unit == "C" || unit == "c" || unit == "Celsius" || unit == "celsius"   
 puts "The temperature is #{convertC} degrees Fahrenheit."
elsif unit == "F" || unit == "f" || unit == "Fahrenheit" || unit == "fahrenheit"
 puts "The temperature is #{convertF} degrees Celsius."
else
 puts "The unit given for temperature is invalid"
end