How do you insert a variable into a menu title ?

Let me clarify;

instead of writing 'You have chosen a car which travels at 70mph'

is there any way of writing a generic title 'You have chosen a car which travels at __mph' and fill in the gaps with specific data from a data file.

My script as it stands:

choice = menu('How are you travelling?', 'Thrust SSC', 'North American X-15', 'Walking', 'Space Shuttle','Millenium Falcon','None of the above');

if choice ==1;

menu('You are travelling from Mercury to Venus, this journey is *** Km or *** Miles. You have chosen to travel by the Thrust SSC, which travels at *** Km/h or *** mph. You will arrive at your destination in ***','Done','Plot Distance v Time graph');
 end;
The *** is where i would like to reference a value from a datafile.

Answer 1

[Walter Roberson]

menu_title = sprintf('You are travelling from Mercury to Venus, this journey is %f Km or %f Miles. You have chosen to travel by the Thrust SSC, which travels at %f Km/h or %f mph. You will arrive at your destination in %s', NumberOfKm, NumberofMiles, Km_per_hour, M_per_hour, How_long_string);
menu( menu_title,'Done','Plot Distance v Time graph');