siven function improve the code versus if no function was present?

def fahrenheit$\_$to$\_$celsius$($fahrenheit$)$:

return $($fahrenheit $-32\mathrm{.}0)*5\mathrm{.}0/9\mathrm{.}0$

fahrenheit $=$ float$($input$())$

c$1=$ fahrenheit$\_$to$\_$celsius$($fahrenheit$)$;

c$2=$ fahrenheit$\_$to$\_$celsius$(32\mathrm{.}0)$;

c$3=$ fahrenheit$\_$to$\_$celsius$(72\mathrm{.}0)$;

The use of the function makes the program run faster

The use of the function decreases redundant code

The use of the function reduces the number of variables in the code

The function does not improve the code