I'm with a problem with my code, because it works when I run it on VScode, but when I try on HackerRank, it don't works

def convert_temp(temperature,input_scale:,output_scale:'celsius') if input_scale=='celsius' if output_scale=='kelvin'

  temperature+=273.15

elsif output_scale=='fahrenheit'

  temperature=((temperature*9/5)+32).to_f

end

elsif input_scale=='kelvin'

if output_scale=='celsius'

  temperature-=273.15

elsif output_scale=='fahrenheit'

  temperature=(((temperature-273.15)*9/5)+32).to_f

end

elsif input_scale=='fahrenheit'

if output_scale=='celsius'

  temperature = ((temperature-32)*5/9).to_f

elsif output_scale=='kelvin'

  temperature =(((temperature-32)*5/9)+273.15).to_f
end

end end

puts convert_temp(0, input_scale: 'celsius', output_scale: 'kelvin')