Difference between revisions of "For"
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|cat2 | |cat2=Conditional | ||
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|cat4 | |cat4 | ||
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Revision as of 19:56, 9 November 2011
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.