Question: Can We Call Main Inside Main In Java?

Can main function be called by another function?

In ‘C’ you can even call the main() function, which is also known as the “called function” of one program in another program, which is called “calling function”; by including the header file into the calling function.

For example, if there are two programs first.

c from the body of main in another..

Can we have 2 main methods in Java?

A class can define multiple methods with the name main. The signature of these methods does not match the signature of the main method. These other methods with different signatures are not considered the “main” method. Yes it is possible to have two main() in the same program.

Can we call main function in C++?

Can main function call itself in C++? The main() function can call itself in C++. This is an example of recursion as that means a function calling itself.

What does string [] args mean?

Whenever you run a Java program with command prompt or want to give command line arguments, then “String[] args” is used. … String[] args in Java is an array of strings which stores arguments passed by command line while starting a program. All the command line arguments are stored in that array.

Can we use Scanf inside printf?

Outputs of the functions like printf and scanf can be use as a parameter to another function. scanf() is a function which is integer return type function. It returns total number of conversion characters in it. … So in your code scanf() returns 1 to printf() and thus output of program is 1 .

Can Java run without main method?

Yes, we can execute a java program without a main method by using a static block. Static block in Java is a group of statements that gets executed only once when the class is loaded into the memory by Java ClassLoader, It is also known as a static initialization block.

Can we declare constructor as final?

No, a constructor can’t be made final. A final method cannot be overridden by any subclasses. As mentioned previously, the final modifier prevents a method from being modified in a subclass.

Can a function call itself?

Recursion is a programming term that means calling a function from itself. Recursive functions can be used to solve tasks in elegant ways. When a function calls itself, that’s called a recursion step.

Can a program compile without main () function?

Here we are using preprocessor(a program which processes the source code before compilation.) directive #define with arguments to give an impression that the program runs without main. But in reality it runs with a hidden main function. … So actually C program can never run without a main() .

Why is namespace used?

A namespace is a declarative region that provides a scope to the identifiers (the names of types, functions, variables, etc) inside it. Namespaces are used to organize code into logical groups and to prevent name collisions that can occur especially when your code base includes multiple libraries.

Can main be called inside printf?

2 Answers. Yes. Although it’s rather special in some ways, printf is just another function. And a function call can be part of an expression.

What is the output of printf %d?

When we write printf(“%d”,x); this means compiler will print the value of x. But as here, there is nothing after %d so compiler will show in output window garbage value.

Can we change args in Java?

Java main method is the entry point of any java program. Its syntax is always public static void main(String[] args) . You can only change the name of String array argument, for example you can change args to myStringArgs . … args or String args[] .

Who calls main function?

The operating system calls the main() function. Actually, it usually calls something else named a strange thing like _init . The C compiler links a standard library to every application which provides this operating system defined entry point and then calls main() .

Why Main is static in Java?

Java main() method is always static, so that compiler can call it without the creation of an object or before the creation of an object of the class. … Static method of a class can be called by using the class name only without creating an object of a class.

Can we use printf inside printf?

What printf does is just push characters to the buffered output stream. … This statement is not correct but, you can use printf within printf. Upon successful return, printf functions return the number of characters printed (not including the trailing ‘\0’ used to end output to strings).

Can we call Main inside main?

Yes, we can call the main() within the main() function. The process of calling a function by the function itself is known as Recursion. Well,you can call a main() within the main() function ,but you should have a condition that does not call the main() function to terminate the program.

What is main () in Java?

The main() Method. A Java application is a public Java class with a main() method. The main() method is the entry point into the application. The signature of the method is always: public static void main(String[] args) Command-line arguments are passed through the args parameter, which is an array of String s.

What is String [] args in Java?

String[] args: It stores Java command line arguments and is an array of type java. lang. String class. Here, the name of the String array is args but it is not fixed and user can use any name in place of it.

What is main () in C?

The basic main() function When the operating system runs a program in C, it passes control of the computer over to that program.

What is main function in C++ with example?

A function is block of code which is used to perform a particular task, for example let’s say you are writing a large C++ program and in that program you want to do a particular task several number of times, like displaying value from 1 to 10, in order to do that you have to write few lines of code and you need to …