adaptive filter theory

Hello All,

I am new to this forum and I need help.

Can someone please explain in simple words the adaptive filter process in MATLAB..
I know the theory but I can not write a simple couple of lines for it in matlab.

I do not understand how the number of iterations is implemented..basically I do not know how to use the for loop..

also is there any specific method for the number of iterations?

any help is highly appreciated.