How can i inlcude a variable in a function

Hi

i am trying to use a variable to send program to correct function

Boxon variable is just a number

eg if Boxon=2

runtime.callFunction(Boxon);

how can i send it to function called 2

i have tried

runtime.callFunction(Boxon);

runtime.callFunction('Boxon');

runtime.callFunction("Boxon");

thankyou

It's not clear what you're trying to do. Normally function names are strings, not numbers. If you want to pass 2 as a parameter, it needs to come after the function name.