Objective-C Operators

Objective-C Operators , Objective-C also provides a set of so called logical operators designed to return boolean true and false. The OR (||) operator returns 1 if one of its two operands evaluates to true, otherwise it returns 0

sizeof Operator

sizeof() returns the size of an variable. sizeof(anInteger) will return 4.

Conditional Expression

value = condition ? X:Y is called the Conditional Expression.

If Condition is true ? Then assign X to value, Otherwise assign Y to value.

Conditional operator ? : can be used to replace if...else statements. 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.

Address Operator

& returns the address of an variable. &a; will give actual address of the variable.

Pointer * operator

* is the Pointer operator to a variable. *a; will pointer to a variable.

Arithmetic Operators

Relational Operators

Logical Operators

Bitwise Operators

Assignment Operators

Compound Assignment Operators

Increment and Decrement Operators

x = x + 1; // Increase value of variable x by 1

x = x - 1; // Decrease value of variable x by 1	

x++; Increment x by 1

x--; Decrement x by 1

Comparison Operators

if (x == y)
      // Perform task

Boolean Logical Operators

bool flag = true; //variable is true
bool secondFlag;

secondFlag = !flag; // secondFlag set to false


if ((10 < 20) || (20 < 10))
        NSLog (@"Expression is true");


if ((10 < 20) && (20 < 10))
      NSLog (@"Expression is true");

The Ternary Operator

[condition] ? [true expression] : [false expression]

int x = 10;
int y = 20;

NSLog(@"Largest number is %i", x > y ? x : y );

Happy Coding 🙂