How do you use cout? (2023)

How do you use cout?

To print a value to the screen, write the word cout, followed by the insertion operator (<<), which you create by typing the less-than character (<) twice. Even though this is two characters, C++ treats it as one. Follow the insertion character with your data. Listing 2.2 illustrates how this is used.

The C++ cout statement is the instance of the ostream class. It is used to produce output on the standard output device which is usually the display screen. The data needed to be displayed on the screen is inserted in the standard output stream (cout) using the insertion operator(<<).

Cout is used with the insertion operator, which is written as << (two "less than" signs). The actual output then follows, written within quotation marks. The line must end with a semicolon. Become familiar with other uses of cout.

How To Use Cout In C++ - YouTube

MiiNiPaa (8886) << is a bitwise left shift operator. It is overloaded to work differently with ostream and derived classes. Standard library provides overloads fo all built-in types and several calsses from standard library (std::string for example). You can also provide overload for your own classes.

cout stands for console or character output, which is by default is directed to standard output.

Standard output (cout) On most program environments, the standard output by default is the screen, and the C++ stream object defined to access it is cout . For formatted output operations, cout is used together with the insertion operator, which is written as << (i.e., two "less than" signs).

A statement to print the value of a variable or a string of characters (set of characters enclosed by double quotes) to the screen begins with cout, followed by the insertion operator, («) which is created by typing the ``less than'' character (<) twice. The data to be printed follows the insertion operator.

Std::cout is the preferred way to print a string in C++.

Is cout the same as printf?

The main difference is that printf() is used to send formated string to the standard output, while cout doesn't let you do the same, if you are doing some program serious, you should be using printf(). As pointed out above, printf is a function, cout an object.

One of the most useful is std::cout, which allows us to send data to the console to be printed as text. cout stands for “character output”. In this program, we have included iostream so that we have access to std::cout.

Std::cout is the preferred way to print a string in C++.

The main difference is that printf() is used to send formated string to the standard output, while cout doesn't let you do the same, if you are doing some program serious, you should be using printf(). As pointed out above, printf is a function, cout an object.

\" - escape sequence

Since printf uses ""(double quotes) to identify starting and ending point of a message, we need to use \" escape sequence to print the double quotes.