input and output in cpp

# In C++, cout sends formatted output to standard output devices, such as the screen. We use the cout object along with the << operator for displaying output.

#Input Stream: If the direction of flow of bytes is from the device(for example, Keyboard) to the main memory then this process is called input.

# cout << "Output sentence";  // prints Output sentence on screen

cout << 120;               // prints number 120 on screen
cout << x;                 // prints the value of x on screen  

             Code 

#include<iostream>
using namespace std;
int main()
{
	int a ;
	cin>>a;
	// it taks input from user 
	
	
	cout<<" DKCODER MY YOUTUBE CHANNEL NAME "<<endl;
	// cout<<"";  to display output on screen 
	return 0;
}