Answer and Explanation:
A wildcard character is a character that can be substituted for either a single character or a string of characters. For instance, in certain operating systems, the asterisk character "*" can be used in lieu of a set of characters, while the character "?" can be used in lieu of a single character.
It is a special character that represents one or more other characters. The most commonly used wildcard characters are the asterisk (*), which typically represents zero or more characters in a string of characters, and the question mark (?), which typically represents any one character.
For example, in searching: run* would mean "any word that starts with 'run' and has any kind of ending." If you entered "run*" at a search engine that offered a wildcard character capability, you would get results for run, runs, running, runner, runners - in short, any possible word that might begin with the three letters.
Use of wildcard character:
Wildcard characters are utilized in customary articulations (a programming type wherein input information is adjusted depending on indicated designs) and in scanning through record catalogs for comparable document names (for instance, if all the work documents on an undertaking start with the characters "F7," you could undoubtedly find all the venture records by just looking for "F7*").
It is a special case character and is a sort of Meta character .
In different card games, a wildcard is an assigned card in the deck of cards.
Um, what? I don't get what you are saying what is your question?
Answer:
The languages C++, Java, Python are Object Oriented Programming languages. What this means is that we create classes and then instantiate those classes. In C++ and Java, we use the new operator to instantiate the classes. So, if we want to display some data when we try to print the instance just like we print the variables of data types like int, double, string etc, we need to define what we need to display. It is because, class are just like data types like int, double etc. But as they are defined by the developer according to his/her needs, so the developer has to define what to print when they are printed.
