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Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_ostream_put.htm below:

C++ Ostream::put() function

The C++ std::ostream::put() function is used to write a single character to the output stream. It is useful for low level character output operations. It takes a single argument of type char, representing the character to be written, and returns a reference to the output stream.

Following is the syntax for std::ostream::put() function.

ostream& put (char c);

• c − It indicates the character to write.

It returns the ostream object (*this).

If an exception is thrown, the object is in a valid state.

Modifies the stream object. Concurrent access to the same stream object may cause data races, except for the standard stream objects (cout, cerr, clog) when these are synchronized with stdio.

In the following example, we are going to consider the basic usage of the put() function.

#include <iostream>
int main()
{
    std::cout.put('A');
    return 0;
}

Output of the above code is as follows −

A

Consider the following example, where we aare going to to write the alphabet letters to the output with a space between each character using the put() function.

#include <iostream>
int main()
{
    for (char x = 'a'; x <= 'z'; ++x) {
        std::cout.put(x);
        std::cout.put(' ');
    }
    std::cout.put('\n');
    return 0;
}

Following is the output of the above code −

a b c d e f g h i j k l m n o p q r s t u v w x y z 

Let' look at the following example, where we are going to use the put() function in a chain to output multiple characters.

#include <iostream>
int main()
{
    std::cout.put('T').put('U').put('T').put('O').put('R').put('I').put('A').put('L').put('S').put('P').put('O').put('I').put('N').put('T').put('\n');
    return 0;
}

If we run the above code it will generate the following output −

TUTORIALSPOINT

ostream.htm

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