what is the problem with my function?

i'm having a problem with my function..

function[T,S]=MCDK(X)

then it says "ERROR; Function definitions are not permitted in this context"

Answer 1

[Azzi Abdelmalek]

I suppose you are trying to run

function[T,S]=MCDK(X)

The correct way is

[T,S]=MCDK(X)