Javascript Operators
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Operators used in Javascript
Below is a listing of often used operators in javascript to help understand some of the used code in Oolite scripts.
Artithmetic Operators
Operator Description
+ Addition
- Subtraction
* Multiplication
/ Division
% Modulus (remainder of a division)
++ Increment (++X means increment by one X before use and X++ means increment X after use
-- Decrement (--X means idecrement by one X before use and X-- means decrement X after use
Assignment Operators
Operator Description
= Assign
+= Add and assign. For example, x+=y is the same as x=x+y.
-= Subtract and assign. For example, x-=y is the same as x=x-y.
*= Multiply and assign. For example, x*=y is the same as x=x*y.
/= Divide and assign. For example, x/=y is the same as x=x/y.
%= Modulus and assign. For example, x%=y is the same as x=x%y.
Comparison Operators
Operator Description
== Is equal to
=== Is identical (is equal to and is of the same type)
!= Is not equal to
!== Is not identical
> Greater than
>= Greater than or equal to
< Less than
<= Less than or equal to
Logical/boolean Operators
Operator Description
&& and
|| or
! not
String Operators
In JavaScript, a string is simply a piece of text.
Operator Description
= Assignment
+ Concatenate (join two strings together)
+= Concatenate and assign
Bit Operators
Operator Description
& Bitwise and
| Bitwise or
^ Bitwise exclusive or (xor)
<< Schift one bit to the left
>> Schift one bit to the right
~ Flip all bits (invert 0 to 1 and 1 to 0)