How could I extract last column in a matrix if I don't know the size of matrix?

I want to select only last coloumn..because in my program the size of matices is change every time..these are some example of my matices

(150x23)

(150x34)

(150*41)

...etc

Answer 1

[madhan ravi]

matrix(:,end)

[Bajdar Nour]

@ madhan ravi, thanks alot,, and how could I select all the coulomns except the last coulomn? thanks for helping

[madhan ravi]

matrix(:,1:end-1)

[Vinod]

thank you helpful me