While

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/LSL

while

while( condition ) loop

•	condition	–	If this executes as true then loop is executed.
•	loop	–	Can be either a single statement, a block statement, or a null statement.

Any of the statements can be null statements.

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

//single statement
integer a = 0;
integer b = 10;
while(a < b)
    llOwnerSay((string)(a++));

//block statement
integer a = 0;
integer b = 10;
while(a < b)
{
    llOwnerSay((string)a);
    ++a;
}

//null statement
integer a = 0;
integer b = 10;
while(a++ < b);

Notes

A do-while loop is faster than a while loop or a for loop in LSO. (see discussion)

See Also

Articles

Important: Please read this intro of how to iterate over a list in LSL.

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.

While