Temperature conversion script doest work with negative input value

I've made a script that converts Farenheit to Celsius and Kelvin, but when the input value is negative the script breaks and gives incorrect values. how can i fix this?

% input the temperature in farenheit
F=input('Input the temperature in Farenheit that you want to convert to Celsius and Kelvin:');
% calculate the temperature in celsius
C=5/9*((F)-32);
%calculate the tempurature in kelvin
K=C+273;
% output the temperature in celsius and kelvin
disp([num2str(F),' degrees Farenheit is ',num2str(C),' degrees Celsius and ',num2str(K),' degrees Kelvin'])

[Torsten]

Disregarding the fact that "Farenheit" should be "Fahrenheit", your code works just fine.

Answer 1

[John D'Errico]

Nope. Works just fine. For example, with F = -459 (approximately absolute zero) you should get approximately -273.

F=input('Input the temperature in Farenheit that you want to convert to Celsius and Kelvin:');
Input the temperature in Farenheit that you want to convert to Celsius and Kelvin:-459

F
F =
  -459
  
C=5/9*((F)-32)
C =
      -272.78