Scripting/Syntaxe/en

De DigiWiki.

Operators

Operators are used to cause an operation (or mathematical action) to be performed on one (such as !) or two operands. The easy and common example is 1 + 2 where 1 and 2 are operands, and the + is the operator.

This concept can be extended much further with LSL since operands can be variables with the special case of the assignment operators requiring that the left hand side be a variable.

Operator	Description	Usage Example
()	Parentheses	a * (b + c)
[]	Brackets: list constructor	[a, 2, "this", 0.01]
(type)	Typecasting	message = "The result is:" + (string) result;
! ~ ++ --	Logical-NOT, Bitwise-NOT, Increment, Decrement	counter++;
* / %	Multiply/Dot-Product, Divide, Modulus/Cross-Product	rollover = (count + 1)%5;
-	Subtraction	one = 3 - 2;
+	Addition or joining Strings	two = 1+1; text = "Hello" + "World";
+	Concatenation or joining Lists	myList = [1, 2, 3] + [4, 5]; newList = oldList + addList;
<< >>	Left Shift, Right Shift	eight = 4 << 1;
< <= > >=	Less Than, Less Than Or Equal To, Greater Than, Greater Than or Equal To	isFalse = (6 <= 4);
==  !=	Comparison Equal, Comparison Not Equal	isFalse = ("this" == "that");
&	Bitwise AND	zero = 4 & 2; four = 4 & 4;
^	Bitwise XOR	zero = 4 ^ 4; six = 4 ^ 2;
|	Bitwise OR	four = 4 | 4; six = 4 | 2;
||	Logical OR	isTrue = (FALSE || TRUE);
&&	Logical AND	isFalse = (FALSE && TRUE);
= += -= *= /= %=	Assignment	four = 4;

Note: The ++ (increment) and -- (decrement) have their effect on their number either before or after the number is evaluated when used in conditions dependent on whether they are before or after the number.