Objective-C language has the following operators.
The following table shows all the arithmetic operators in Objective-C.
|+||Adds two operands|
|-||Subtracts second operand from the first|
|*||Multiplies both operands|
|/||Divides numerator by denominator|
|%||Modulus Operator and remainder of after an integer division|
|++||Increment operator increases integer value by one|
|--||Decrement operator decreases integer value by one|
The following table lists the relational operators supported by Objective-C.
|==||Checks if the values of two operands are equal or not.|
|!=||Checks if the values of two operands are not equal.|
|>||Checks if the value of left operand is greater than the value of right operand.|
|<||Checks if the value of left operand is less than the value of right operand.|
|>=||Checks if the value of left operand is greater than or equal to the value of right operand.|
|<=||Checks if the value of left operand is less than or equal to the value of right operand.|
The following table lists the logical operators supported by Objective-C language.
|&&||Logical AND operator. If both the operands are non zero then condition becomes true.|
|||||Logical OR Operator. If any of the two operands is non zero then condition becomes true.|
|!||Logical NOT Operator. Reverse the logical state of its operand. If a condition is true, then Logical NOT operator will make false.|
Bitwise operator works on bits and perform bit by bit operation.
The truth tables for &, |, and ^ are as follows:
|p||q||p & q||p | q||p ^ q|
The Bitwise operators supported by Objective-C language are listed in the following table.
|&||Binary AND Operator copies a bit to the result if it exists in both operands.|
||||Binary OR Operator copies a bit if it exists in either operand.|
|^||Binary XOR Operator copies the bit if it is set in one operand but not both.|
|~||Binary Ones Complement Operator is unary and has the effect of 'flipping' bits.|
|<<||Binary Left Shift Operator. The left operands value is moved left by the number of bits specified by the right operand.|
|>>||Binary Right Shift Operator. The left operands value is moved right by the number of bits specified by the right operand.|
There are following assignment operators supported by Objective-C language:
|=||Assignment operator, Assigns values from right side operands to left side operand|
|+=||Add AND assignment operator, It adds right operand to the left operand and assigns the result to left operand|
|-=||Subtract AND assignment operator, It subtracts right operand from the left operand and assigns the result to left operand|
|*=||Multiply AND assignment operator, It multiplies right operand with the left operand and assigns the result to left operand|
|/=||Divide AND assignment operator, It divides left operand with the right operand and assigns the result to left operand|
|%=||Modulus AND assignment operator, It takes modulus using two operands and assigns the result to left operand|
|<<=||Left shift AND assignment operator|
|>>=||Right shift AND assignment operator|
|&=||Bitwise AND assignment operator|
|^=||bitwise exclusive OR and assignment operator|
||=||bitwise inclusive OR and assignment operator|
sizeof() returns the size of an variable. sizeof(anInteger) will return 4.
value = condition ? X:Y is called the Conditional Expression.
If Condition is true ? Then assign X to value, Otherwise assign Y to value.
? : can be used to replace
It has the following general form:
Exp1 ? Exp2 : Exp3;
Where Exp1, Exp2, and Exp3 are expressions. Notice the use and placement of the colon.
The value of a ? expression is determined like this: Exp1 is evaluated. If it is true, then Exp2 is evaluated and becomes the value of the entire ? expression. If Exp1 is false, then Exp3 is evaluated and its value becomes the value of the expression.
& returns the address of an variable.
&a; will give actual address of the variable.
* is the Pointer operator to a variable.
*a; will pointer to a variable.