Use of cout in C++ :

• cout is used for displaying data on the screen.
• The operator << called as insertion operator or put to operator.
• Insertion operator is similar to the printf() operation in C.
• cout is the object of ostream class.

Example of cout :

         void main(){

            int a=10;

            int b=20;

         cout<<a<<b;

is similar to -

     cout<<a;

     cout<<b;

Output:

          1020