
The Float Stack primitive component is a last-in-first-out storage device for float values. A stack is like a stack of cards where the last item you ‘push’ on top is the first to ‘pop’ out.
A float input for the values to be stored.
Push - a trigger input which causes the value at the float input to be stored on the top of the stack
Pop - a trigger input which causes the last value stored in the stack to be removed from the stack and the value below to become the active output.
A float output of the top-most value of the stack, when a value is pushed, that item is output. When the stack is popped the value below is revealed.
N - an integer output giving the current number of values stored in the stack.

This very simple schematic will quickly give you a feel for what the Float Stack does if the above description wasn’t enought for you. A stock control was altered slightly to send a trigger when the mouse move has ended.
Float Stack Example OSM