C++ Comments
Comments can be used to explain C++ code, and to make it more readable. It can also be used to prevent execution when testing alternative code. Comments can be singled-lined or multi-lined.
Tag: c++
C++ New Lines
New Lines
To insert a new line in your output, you can use the \n character:
Example
#include <iostream>
using namespace std;
int main() {
cout << "Hello World! \n";
cout << "I am learning C++";
return 0;
}
You can also use another << operator and place the \n character after the text, like this : Continue reading C++ New Lines
C++ Output Numbers
C++ Print Numbers
You can also use cout() to print numbers.
However, unlike text, we don’t put numbers inside double quotes:
Example
#include <iostream>
using namespace std;
int main() {
cout << 3;
return 0;
}
You can also perform mathematical calculations: Continue reading C++ Output Numbers
C++ Output
C++ Output (Print Text)
The cout object, together with the << operator, is used to output values and print text.
Just remember to surround the text with double quotes (""): Continue reading C++ Output
C++ Statements
C++ Statements
A computer program is a list of “instructions” to be “executed” by a computer.
In a programming language, these programming instructions are called statements.
The following statement “instructs” the compiler to print the text “Hello World” to the screen: Continue reading C++ Statements
C++ Syntax
C++ Syntax
Let’s break up the following code to understand it better:
Example
#include <iostream>
using namespace std;
int main() {
cout << "Hello World!";
return 0;
}
Example explained
Line 1: #include <iostream> is a header file library that lets us work with input and output objects, such as cout (used in line 5). Header files add functionality to C++ programs.
Line 2: using namespace std means that we can use names for objects and variables from the standard library. Continue reading C++ Syntax
C++ Getting Started
C++ Get Started
To start using C++, you need two things:
- A text editor, like Notepad, to write C++ code
- A compiler, like GCC, to translate the C++ code into a language that the computer will understand
There are many text editors and compilers to choose from. In this tutorial, we will use an IDE (see below).