Difference between revisions of "For"
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Lady Sumoku (talk | contribs) m (Replaced old <LSL> block with <source lang="lsl2">) |
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{{ | {{LSL_Conditional | ||
| | |statement=for | ||
| | |statement_header | ||
| | |statement_desc=Any of the statements can be null statements. | ||
| | |statement_end=loop | ||
| | |statement_end_desc=Can be either a single statement, a block statement, or a null statement. | ||
|p1_name=initializer|p1_desc=Executed once just before checking '''condition'''. | |||
|p2_name=condition|p2_desc=If this executes as true then '''loop''' is executed. | |||
|p1_name=initializer|p1_desc= | |p3_name=increment|p3_desc=Executed after '''loop''', then '''condition''' is checked again. | ||
|p2_name=condition|p2_desc= | |||
|p3_name=increment|p3_desc= | |||
|constants | |constants | ||
|spec | |spec | ||
|caveats | |caveats | ||
|examples | |examples=<source lang="lsl2"> | ||
//single statement type. | |||
integer a; | |||
integer b = 10; | |||
for(a = 1; a <= b; ++a) | |||
llOwnerSay((string)a); | |||
</source> | |||
<source lang="lsl2"> | |||
//block statement | |||
integer a = 0; | |||
integer b = 10; | |||
for(; a < b; ++a) | |||
{ | |||
llOwnerSay((string)a); | |||
llOwnerSay((string)a); | |||
} | |||
</source> | |||
<source lang="lsl2"> | |||
//null statement | |||
integer a = 0; | |||
integer b = 10; | |||
for(; a < b; llOwnerSay((string)(a++))); | |||
</source> | |||
|helpers | |helpers | ||
|also_header | |also_header | ||
|also_functions | |also_functions | ||
|also_tests | |||
|also_articles | |also_articles | ||
|also_footer | |also_footer | ||
|notes | |notes=A for loop is the same as a while loop as below. | ||
<source lang="lsl2"> | |||
initializer; | |||
while(condition) | |||
{ | |||
loop; | |||
increment; | |||
} | |||
</source> | |||
|mode | |mode | ||
| | |deprecated | ||
|cat1=Flow Control/Loop | |||
|cat2=Conditional | |||
|cat3 | |||
|cat4 | |||
}} | }} |
Revision as of 02:05, 22 January 2015
LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
for( initializer; condition; increment ) loop
• | initializer | – | Executed once just before checking condition. | |
• | condition | – | If this executes as true then loop is executed. | |
• | increment | – | Executed after loop, then condition is checked again. | |
• | loop | – | Can be either a single statement, a block statement, or a null statement. |
Any of the statements can be null statements.
Specification
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 type.
integer a;
integer b = 10;
for(a = 1; a <= b; ++a)
llOwnerSay((string)a);
//block statement
integer a = 0;
integer b = 10;
for(; a < b; ++a)
{
llOwnerSay((string)a);
llOwnerSay((string)a);
}
//null statement
integer a = 0;
integer b = 10;
for(; a < b; llOwnerSay((string)(a++)));
Notes
A for loop is the same as a while loop as below.
initializer;
while(condition)
{
loop;
increment;
}
Deep Notes
Footnotes
- ^ The OpenSim LSL compiler will not do this implicitly. You will need to use an explicit check.