isempty loop

how do I create a loop that doesn't do anything but go down a column a checking there is data in each cell and only stops when there is nothing in the next cell. What I have currently is a code that sorts out data but I would like the code to stop when there is no data in the next cell. I've researched that you can use isempty but I don't really know how to use it.

thanks alot

why i need the loop is because I am continuously adding new data so I want a code that stops when the next cell is empty but as I'm new to vba I want to simplfy it so I can understand so I just want a loop that literally checks there is values in column a and when it hits a cell thats empty the code just stops. thats all, thanks guy

thanks alot steffen thats exactly what I wanted I hope you know how much I appreciate your help absolute life saver