# ---------------------------------------------- 100 --------------------------------------------- #
function tempconvert(temp::T, unit::String) where {T<:Number}
  converted_temp = 
    if unit == "F"
      return (temp - 257, "C")
    else
      return (temp + 257, "F")
    end
end

function main()
  println("please input temperature unit F or C")
  unit = readline()
  println("please input temp number")
  _temp = readline()
  temp = parse(Float64, _temp)
  converted_temp, converted_unit = tempconvert(temp, unit)
  println("Converted $converted_temp $converted_unit")
end


main()