Difference between revisions of "Do while"

From Second Life Wiki
Jump to navigation Jump to search
m (Speed and Memory usage of Do...While.)
Line 1: Line 1:
{{Multi-lang}}
{{#vardefine:p_loop_desc|Executes once, then executes '''condition'''.
{{#vardefine:p_loop_desc|Executes once, then executes '''condition'''.
}}{{#vardefine:p_condition_desc|If condition executes true, it then loops back and executes '''loop''' again.
}}{{#vardefine:p_condition_desc|If condition executes true, it then loops back and executes '''loop''' again.

Revision as of 04:49, 2 December 2007

do loop while (condition);

•  loop Executes once, then executes condition.
•  condition If condition executes true, it then loops back and executes loop again.


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.

Specification

Conditional Types
Type Condition
integer True if it is not zero.
float True if it is not zero.[1]
string True if its length is not zero.
key True only if it is a valid key and not NULL_KEY.
vector True if the vector is not ZERO_VECTOR.
rotation True if the rotation is not ZERO_ROTATION.
list True if the length is not zero. Note that correct behavior is only seen with Mono-compiled scripts; LSO-compiled scripts incorrectly resolve to false if the list is non-empty: BUG-230728

Examples

//Counts from 1 to 5
default
{
    state_entry()
    {
        integer olf;
        do
            llSay(0, (string) (++olf));
        while(olf<5);
    }
}
//Counts from 0 to 4
default
{
    state_entry()
    {
        integer olf;
        do
            llSay(0, (string)olf);
        while((++olf)<5);
    }
}

Deep Notes

Search JIRA for related Issues

Footnotes

  1. ^ The OpenSim LSL compiler will not do this implicitly. You will need to use an explicit check.