How define a variable like pi in matlab?

I want to define several variables like pi,maybe we can call them the constant value, and call them in the functions without defining the twice time. I can not use the global variable because there are almost 100 function files in our project and I do not want to declare them in every function files, it's too troublesome.

I've tried to write the variable in the matlabrc.m, but I can only call the variable in the command window and when I call it in the function file, the matlab told me that it's an undefined variable.

So please tell me how to solve this problem, it's really appreciated of you.

I'm looking forward to your answer.

Answer 1

[Azzi Abdelmalek]

create a function

function out=cst1
  out=0.12453648

then call the function cst1

a=cst1

Answer 2

[per isakson]

Another way:

    >> my_constants.pi
    ans =
        3.1416

where

    classdef    my_constants
        properties ( Constant = true )
           pi  = 355/113;
           etc = 17;
        end
    end

Pro: all constants in one file

Con: an extra string in the call