Cout and Cin Function in C++

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Cout<< and Cin>> Function in C++

cout<< Function in C++ is used for print message on scree. and cin>> Function in C++ is used for get or read value form keyboard. The iostream library is part of the C++ standard library that deals with basic input and output.

Cout Function in C++

  • cout is used for displaying data on the screen.
  • The operator << called as insertion operator or put to operator.
  • The Insertion operator can be overloaded.
  • Insertion operator is similar to the printf() operation in C.
  • cout is the object of ostream class.
  • Data flow direction is from variable to output device.
  • Multiple outputs can be displayed using cout.

Example Cout and Cin Function in C++

	
#include<iostream.h>
#include<conio.h>

void main() 
{  
 int num;  
 clrscr();  
 cout<<"Hello word !";  // print message on screen
 getch();  
}  

Output

	
Hello word !

Cin Function in C++

cin>>: cin is used for get or read value form keyboard.

Example

	
#include<iostream.h>
#include<conio.h>

void main() 
{  
 int num;  
 clrscr();  
 cout<<"Enter any number:";
 cin>>num;  // accept one value form keyboard
 cout<<"Number is: "<<num;
 getch();  
}  

Output

	
Enter any number :100
Number is: 100

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