+ Adds two operands A + B = 30
- Subtracts second operand from the first A - B = -10
* Multiplies both operands A * B = 200
/ Divides numerator by denominator B / A = 2
% Modulus Operator and remainder of after an integer division B % A = 0
++ Increments operator increases integer value by one A++ = 11
-- Decrements operator decreases integer value by one A-- = 9

## 例子

```#import <Foundation/Foundation.h>

main()
{
int a = 21;
int b = 10;
int c ;

c = a + b;
NSLog(@"Line 1 - Value of c is %d", c );
c = a - b;
NSLog(@"Line 2 - Value of c is %d", c );
c = a * b;
NSLog(@"Line 3 - Value of c is %d", c );
c = a / b;
NSLog(@"Line 4 - Value of c is %d", c );
c = a % b;
NSLog(@"Line 5 - Value of c is %d", c );
c = a++;
NSLog(@"Line 6 - Value of c is %d", c );
c = a--;
NSLog(@"Line 7 - Value of c is %d", c );

}```

```2013-09-07 22:10:27.005 demo Line 1 - Value of c is 31
2013-09-07 22:10:27.005 demo Line 2 - Value of c is 11
2013-09-07 22:10:27.005 demo Line 3 - Value of c is 210
2013-09-07 22:10:27.005 demo Line 4 - Value of c is 2
2013-09-07 22:10:27.005 demo Line 5 - Value of c is 1
2013-09-07 22:10:27.005 demo Line 6 - Value of c is 21
2013-09-07 22:10:27.005 demo Line 7 - Value of c is 22```