Using Objective-C Operators in iPad App Development

Objective-C operators, like those in other programming languages, let you perform operations on variables (hence the name). Objective-C provides many operators, and keeping track of all of them can be difficult as you program your iPad app. Use the following tables to jog your memory as to which operator accomplishes what task.

Arithmetic Operators

Operator	What It Does
+	Addition
-	Subtraction
*	Multiplication
/	Division
%	Modulo

Relational and Equality Operators

Operator	What It Does
==	Equal to
!=	Not equal to
>	Greater than
<	Less than
>=	Greater than or equal to
<=	Less than or equal to

Logical Operators

Operator	What It Does
!	NOT
&&	Logical AND
||	Logical OR

Compound Assignment Operators

Operator	What It Does
+=	Addition
-=	Subtraction
*=	Multiplication
\/=	Division
\%=	Modulo
&=	Bitwise AND
|=	Bitwise Inclusive OR
^=	Exclusive OR
<<=	Shift Left
>>=	Shift Right

Increment and Decrement Operators

Operator	What It Does
++	Addition
--	Subtraction
*=	Multiplication
/=	Division
%=	Modulo
&=	Bitwise AND
|=	Bitwise Inclusive OR
^=	Exclusive OR
<<=	Shift Left
>>=	Shift Right

Bitwise Operators

Operator	What It Does
&	Bitwise AND
|	Bitwise Inclusive OR
^	Exclusive OR
~	Unary complement (bit inversion)
<<	Shift Left
>>	Shift Right

Other operators

Operator	What It Does
()	Cast
,	Comma
Sizeof()	Size of
? :	Conditional
&	Address
*	Indirection

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