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Introduction to C++

bookOutput

To print something in C++ we will use the object cout with the operator <<. The message you want to output must be enclosed with double quotes. For example:


              
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#include &lt;iostream&gt;
using namespace std;
 
int main() {
 &nbsp&nbsp&nbsp&nbspcout << "I love C++!";
&nbsp&nbsp&nbsp&nbspreturn 0;
}
copy

To get the same result, you can also write the code without using namespace std:

#include <iostream>

int main() {
    std::cout << "I love C++!";
    return 0;
}

Pay attention that you can use the multiple insertion operator and add as many cout objects as you want:


              
12345678

            
#include &lt;iostream&gt;
using namespace std;
 
int main() {
&nbsp&nbsp&nbsp&nbspcout << "I love programming! ";
&nbsp&nbsp&nbsp&nbspcout << "I love C++" << " and " << "Python!";
 &nbsp&nbsp&nbsp&nbspreturn 0;
}
copy

Every cout object or << operator doesn’t write your code to a new line.

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Print the message "Have a good day!":

#include <iostream>
using namespace std;

int main() {
    << "Have a good day!";
    return 0;
}
Have a good day!

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 1. ChapterΒ 2

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bookOutput

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To print something in C++ we will use the object cout with the operator <<. The message you want to output must be enclosed with double quotes. For example:


              
1234567

            
#include &lt;iostream&gt;
using namespace std;
 
int main() {
 &nbsp&nbsp&nbsp&nbspcout << "I love C++!";
&nbsp&nbsp&nbsp&nbspreturn 0;
}
copy

To get the same result, you can also write the code without using namespace std:

#include <iostream>

int main() {
    std::cout << "I love C++!";
    return 0;
}

Pay attention that you can use the multiple insertion operator and add as many cout objects as you want:


              
12345678

            
#include &lt;iostream&gt;
using namespace std;
 
int main() {
&nbsp&nbsp&nbsp&nbspcout << "I love programming! ";
&nbsp&nbsp&nbsp&nbspcout << "I love C++" << " and " << "Python!";
 &nbsp&nbsp&nbsp&nbspreturn 0;
}
copy

Every cout object or << operator doesn’t write your code to a new line.

question-icon

Print the message "Have a good day!":

#include <iostream>
using namespace std;

int main() {
    << "Have a good day!";
    return 0;
}
Have a good day!

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 1. ChapterΒ 2
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