Difference between revisions of "While"

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m (LSL while moved to While)
m (Replaced old <LSL> block with <source lang="lsl2">)
 
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|spec
|spec
|caveats
|caveats
|examples=<pre>//single statement
|examples=<source lang="lsl2">
//single statement
integer a = 0;
integer a = 0;
integer b = 10;
integer b = 10;
while(a < b)
while(a < b)
     llOwnerSay((string)(a++));
     llOwnerSay((string)(a++));
</pre>
</source>
<pre>//block statement
<source lang="lsl2">
//block statement
integer a = 0;
integer a = 0;
integer b = 10;
integer b = 10;
Line 23: Line 25:
     ++a;
     ++a;
}
}
</pre>
</source>
<pre>//null statement
<source lang="lsl2">
//null statement
integer a = 0;
integer a = 0;
integer b = 10;
integer b = 10;
while(a++ < b);
while(a++ < b);
</pre>
</source>
|helpers
|helpers
|also_header
|also_header
|also_functions
|also_functions
|also_tests
|also_tests
|also_articles
|also_articles=
{{LSL Tip|Please read [[User:Kireji_Haiku/How_to_deal_with_lists_in_LSL|this intro of how to iterate over a list in LSL]].}}
|also_footer
|also_footer
|notes
|notes=A {{LSLG|do-while}} loop is faster than a while loop or a {{LSLG|for}} loop in LSO. (see discussion)
|mode
|mode
|deprecated
|deprecated
|cat1
|cat1=Conditional
|cat2
|cat2
|cat3
|cat3
|cat4
|cat4
}}
}}

Latest revision as of 01:52, 22 January 2015

while( conditionloop

•  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

KBcaution.png 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.