A trick for flipping a flag in LSL

Chatting on the Scripters Support Group, Trent Platthy posted an interesting trick I hadn't thought of before for flipping a flag variable.

flag=!flag;

Nice and simple. :)

A code example:

integer flag=0;
default
{
    state_entry()
    {
        llSay(0, "Hello, Avatar!");
    }

    touch_start(integer total_number)
    {
        if(flag)
        {
             //flag is set
             llSay(0,"Flag is Set");
        }
        else
        {
           llSay(0,"Flag is not set.");
        }
        flag=!flag; //toggle
   }
}