Increment operator in C++ | Decrement operator in C++

Increment Decrement operator in C++

Increment operator in C++ | Decrement operator in C++



Increment operator in C++ 

++ is known as Increment operator in C++. It adds one to the existing value of a variable of numeric or char type.  It can be used in two ways:

Prefix Form of Increment operator in C++ 

In prefix form, increment operator ++ is placed before the variable. It immediately adds 1 one to the variable.

Example: ++n

Postfix Form of Increment operator in C++ 

In postfix form, increment operator is placed after the variable. It adds 1 one to the variable in next step.

Example: n++

Decrement operator in C++

— is known as decrement operator in C++. It subtracts one from the existing value of a variable of numeric or char type.  It can be used in two ways:

Prefix Form of Decrement operator in C++ 

In prefix form, decrement operator — is placed before the variable. It immediately subtracts 1 from the variable.

Example: —n

Postfix Form of Increment operator in C++ 

In postfix form, decrement operator is placed after the variable. It subtracts 1 from the variable in next step.

Example: n–

//Program to demonstrate the use of increment (++) and decrement operator(–).

#include<iostream> 
using namespace std;
int main()
{
int num=10;
cout<<endl<<num;
++num;  //a=a+1;
cout<<endl<<num;
num++;
cout<<endl<<num;
num--;
cout<<“\n”<<num
--num;
cout<<“\n”<<num
return 0;
}

Output:

10
11
12
11
10



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Lesson tags: decrement operator in c, Increment operator in C++
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