Do while

LSL Conditional:

{{LSL_Conditional
|statement=do while
|statement_header
|statement_desc=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)
|statement_title=do {{LSL Param|loop}} while ({{LSL Param|condition}});
|p1_name=loop
|p2_name=condition
|constants
|spec
|caveats
|examples=//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 at first iteration
        while (++olf < 5);            // Increments then does the while-test
    }
}
//Counts from 0 to 4 and comments as it loops (block statement demo)
default
{
    state_entry()
    {
        integer olf;
        do
        {   // Curly brackets are required since there is more than one statement within the do-loop
            llSay(0, (string)olf);    
            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
        {   
            // --num decrements num before using it to pick up a detected avatar's name. Thus we retrieve #11 through #0
            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
    }
|helpers
|also_header
|also_functions
|also_tests
|also_articles
|also_footer
|notes
|mode
|deprecated
|cat1=Conditional
|cat2
|cat3
|cat4
}}