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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(14 intermediate revisions by 7 users not shown) | |||
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|statement=for | |statement=for | ||
|statement_header | |statement_header | ||
|statement_desc | |statement_desc=Any of the statements can be null statements. | ||
|statement_end=loop | |statement_end=loop | ||
|statement_end_desc=Can be either a single statement, a block statement, or a null statement. | |statement_end_desc=Can be either a single statement, a block statement, or a null statement. | ||
Line 11: | Line 11: | ||
|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 | ||
Line 18: | Line 40: | ||
|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 | |deprecated | ||
|cat1 | |cat1=Flow Control/Loop | ||
|cat2 | |cat2=Conditional | ||
|cat3 | |cat3 | ||
|cat4 | |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.