Do while

Any of the statements can be null statements. A do...while loop is slightly faster than a while or for loop, and requires fewer bytes of memory than a while or for loop. (However, the speed increase and byte difference does not apply to scripts compiled in Mono)

//Counts from 1 to 5
default
{
    state_entry()
    {
        integer olf;// Without applied value an integer will be defaulted to zero.
        do
            llSay(0, (string) (++olf));// Increment before the while condition.
        while(olf<5);                  // On the first pass/loop olf = 1
    }
}

//Counts from 0 to 4
default
{

   state_entry()
   {
       integer olf;
       do
           llSay(0, (string)olf);// olf is still equal to zero.
       while((++olf)<5);// Increment after/during the test.
   }

}

//Counts from 0 to 4 and coments as it loops (block statement demo)
default
{

   state_entry()
   {
       integer olf;
       do
       {
           llSay(0, (string)olf);// Curly brackets are required since there is more than one looped command.
           llSay(0, "looping");
       }
       while((++olf)<5);
   }

}

//Practical example of where a do/while loop is more immediately useful than a while loop:
//Note that a sensor event always contains input data, so the 'do' always has something to process

   sensor(integer num)
   {   if(num>12)
           num=12;
       do
       {   gNameList += [llGetSubString(llDetectedName(--num),0,23)];//sometimes avatar names are too long for dialog display
           gKeyList +=  [llDetectedKey(num)];//we will dialog select avatar by name, but still need their key
                                             //even if their name has not been truncated above
       }while(num>0);
       llDialog(llGetOwner(),"Choose an avatar.",gNameList,gDlgChan);//channel is pre-defined when llSensor is triggered

    }