How to make constants global

I have a number of functions in my code that i'm currently using, but i'm having to define constants each time inside the functions. is there a way to make the constants 'global' so that all functions can use them without having to be defined each time in each function?

E.g.

function[total_loss] = losses(VG,VD)
dt = 0.1; %Timestep
Vg = trapz(VG)*dt;
Vd = trapz(VD)*dt;
total_loss = Vg+Vd;

end

I've defined the timestep, dt. Is there a way to define it so that other functions can use it?

Answer 1

[the cyclist]

The first google hit for searching global matlab is this documentation page on how to define global variables.