Our Recommendation for You Search your Query, You can find easily. for example search by book name or course name or any other which is related to your education

Followers

Keyword cout and cin in C++ input output stream

Keyword cout and cin in C++ input output stream

 

In C++ to display/print something on the screen so we use the cout.
Its syntax is very is just write cout then put << these symbols and then write inverted coma’s and then anything which you want to print then again inverted coma’s and then semi colon at the end of line.
cout<<”anything to print”;
But to print or display the values of variable just write cout and put << these symbols and then write the variable and put semi colon at the end and line.
For example
int a=4 ;
cout<<a;

What is cout in C++?



Note: 
In C++ at the end of every line in main() function you will put semi colon must.
Example 1
#include<iostream.h>
int main( )
{
cout<<”Hello world”;
return 0;
};
Example 2
#include<iostream.h>
int main( )
{
int a=5;
cout<<a;
return 0;
};
Example 3
#include<iostream.h>
int main( )
{
Char name[20]=”HaroonMuhammad”; 
int age =18;
float gpa= 3.10;
cout<<”My name is” ;
cout<<name;
cout<<”My  age is “;
cout<<age;
cout<<”My gpa is “;
cout<<gpa;
return 0;
};

What is cin in C++? 


cin is use in C++ to input the value of variables from the user. Its syntax is very easy just write cin and put >>these symbols and then write the variable which value you want to input from the user and put semi colon at the end of line.
int a;
cin>>a;
when the user enter some number so it will be automatic assign to the variable a. Note: In C++ at the end of every line in main() function you will put semi colon must.
Example 1
#include<iostream.h>
int main( )
{
int a;
cin>>a;
return 0;
};
Example 2
#include<iostream.h>
int main( )
{
int a;
cin>>a;
cout<<a;
return 0;
};
Example 3
#include<iostream.h>
int main( )
{
Char name[20]; 
int age ;
float gpa;
cout<<”please enter your name ” ;
cin>>name;
cout<<name;
cout<<”Enter your age “;
cin>>age;
cout<<age;
cout<<”Enter your gpa “;
cin>>gpa;
cout<<gpa;
return 0;
};