Difference between revisions of "For"
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m (<lsl> examples & note) |
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|spec | |spec | ||
|caveats | |caveats | ||
|examples=< | |examples=<lsl> | ||
//single statement type. | |||
integer a = 0; | integer a = 0; | ||
integer b = 10; | integer b = 10; | ||
for(; a < b; ++a) | for(; a < b; ++a) | ||
llOwnerSay((string)a); | llOwnerSay((string)a); | ||
</ | </lsl> | ||
< | <lsl> | ||
//block statement | |||
integer a = 0; | integer a = 0; | ||
integer b = 10; | integer b = 10; | ||
| Line 26: | Line 28: | ||
llOwnerSay((string)a); | llOwnerSay((string)a); | ||
} | } | ||
</ | </lsl> | ||
< | <lsl> | ||
//null statement | |||
integer a = 0; | integer a = 0; | ||
integer b = 10; | integer b = 10; | ||
for(; a < b; llOwnerSay((string)(a++))); | for(; a < b; llOwnerSay((string)(a++))); | ||
</ | </lsl> | ||
|helpers | |helpers | ||
|also_header | |also_header | ||
| Line 39: | Line 42: | ||
|also_footer | |also_footer | ||
|notes=A for loop is the same as a while loop as below. | |notes=A for loop is the same as a while loop as below. | ||
< | <lsl> | ||
initializer; | initializer; | ||
while(condition); | while(condition); | ||
| Line 46: | Line 49: | ||
increment; | increment; | ||
} | } | ||
</ | </lsl> | ||
|mode | |mode | ||
|deprecated | |deprecated | ||
Revision as of 17:51, 31 December 2007
| 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
<lsl> //single statement type. integer a = 0; integer b = 10; for(; a < b; ++a)
llOwnerSay((string)a);
</lsl> <lsl> //block statement integer a = 0; integer b = 10; for(; a < b; ++a) {
llOwnerSay((string)a); llOwnerSay((string)a);
} </lsl> <lsl> //null statement integer a = 0; integer b = 10; for(; a < b; llOwnerSay((string)(a++))); </lsl>
Notes
A for loop is the same as a while loop as below. <lsl> initializer; while(condition); {
loop; increment;
} </lsl>
Deep Notes
Footnotes
- ^ The OpenSim LSL compiler will not do this implicitly. You will need to use an explicit check.