C++ Increment And Decrement Operators ++ , --

C++ Increment & Decrement (++,--)

In C++ Introduction & History we have discussed that C++ is real mature baby of C language but having additional features like object oriented support , classes, and other improvements to the C programming language. Then renamed as C++ with ++ increment operator.

++

increment or plus plus ( ++ ) operator use to operate special task.It is use to increment 1 in value of the object

For Example

let x = 5

using ++ operator after variable x++ will add 1 in the value of x

like x = x + 1

now the value of x

x = 6 

--

decrement ( -- ) operator also use to operate same functionality like increment operator but it subtract one from the value of the object

For Example

let x = 5

using -- operator after variable x-- will subtract 1

like x = x - 1

now the value of x

x = 4

There is slight difference of using increment and decrement

( ++ , -- ) operators before and after variable.

( x++ , ++x or x-- , --x )

Example Program of increment and decrement operator

Example

Increment and decrement behave same as shown below

1. #include <iostream> 
2. #include <string> 
3. using namespace std; 
4. int main(){ 
5.     int x = 6 ;
6.     int y = 6 ;  
7.     cout<< " ++ Operator before variable name \n" ;
8.     
9.     cout << x++ << endl ;      // value of x is still 6 at this point
10.     cout << x << endl ;          //it will print 7  after adding
11.    
12.     cout<< " ++ Operator after variable name \n" ;
13.     cout << ++y << endl ;     // value of y is 7 on the spot
14.     cout << y << endl ;         //it will print 7
15. return 0 ;
16. }

Console :

++ Operator before variable name

6

7

++ Operator after variable name

7

7

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