ds_stack_size

This function will return the "size" of the stack, ie: the number of items that have been pushed onto it.

Syntax:

ds_stack_size(id);

Returns:

Real

Example:

if (!ds_stack_empty(control_stack))
{
    num = ds_stack_size(control_stack);
}

The above code checks a DS stack to see if it is empty or not, and if it is not, it gets the number of items that it contains and stores the value in a variable.