Increment and decrement operator

                                Increment and decrement operator
C# provides two operators that can be used to increase or decrease a variable's value by one. These are the increment operator (++) and decrement operator (--). These operators are known as unary operators because they are applied to a single value. The operators can be placed before the variable to be adjusted (prefix) or after it (postfix).

postfix=i++;( In post i=i+i)

prefix=++i;   (In pre i=i+i)

                                                   Increment operator

Example:-

int a;

int b;

// Prefix.  a is incremented before its value is assigned to b

a = 10;

b = ++a;        //a = 11, b = 11;

// Postfix.  a is incremented after its value is assigned to b

a = 10;

b = a++;        //a = 11, b = 10;

One more example to explain you better

int i=5,j=9,a,b;
a=i++;  // output  5 

b=++j; // output  10

                                               Decrement operator
Decrement  operator is same as Increment operator .
Pre  = --i
Post = i--

Example:-

int i=10, a=15,z;

z=(a++)*(++i)/i;

// using their constants

z= 15*11/11;

These increment & decrement are use in loops.


Example(using both Increment and decrement operator ):-

#include<conio.h>

#include<stdio.h>

void main()

{ int i=10,a=20,b;

b=(i++)+(--a);

printf("a:=%d\n",a); 

printf("b:=%d\n",b); 

printf("i:=%d\n",c);

getch();/* this function is scan input .I used it to stop program from closing because when program done its all process it autometically get close*/

}