What Is Void Keyword In C#?

What is a void C#?

The void keyword is used in method signatures to declare a method that does not return a value.

A method declared with the void return type cannot provide any arguments to any return statements they contain..

What is a function C#?

In C# a function is defined as a technique of wrapping code to perform a certain task and then return a value. It is quite different than its predecessor programming languages like C or C++. Here the functions do not exist alone. Functions are a part of the OOPs approach. The function is a member of the class.

What is size of void in C?

What is the size of void pointer in C/C++? The size of void pointer varies system to system. If the system is 16-bit, size of void pointer is 2 bytes. If the system is 32-bit, size of void pointer is 4 bytes.

What is int main void?

main (void) mean? In C and C++ int main(void) means that the function takes NO arguments. C++ does the same even if you simply write int main() , which says the function does not take any argument, and if you dont put void in it, it’ll be the same, but in C there’s a little difference in int main() and int main(void) .

Why void main is used in C?

The void main() indicates that the main() function will not return any value, but the int main() indicates that the main() can return integer type data. When our program is simple, and it is not going to terminate before reaching the last line of the code, or the code is error free, then we can use the void main().

Can we typecast void into int?

void pointer in C / C++ A void pointer can hold address of any type and can be typcasted to any type. Note that the above program compiles in C, but doesn’t compile in C++. In C++, we must explicitly typecast return value of malloc to (int *).

What is size of void pointer?

8 bytesThe size of a long pointer is 8 bytes! The size of a float pointer is 8 bytes! The size of a double pointer is 8 bytes! The size of a void pointer is 8 bytes!

What is the size of empty class?

1 byteIt is known that size of an empty class is not zero. Generally, it is 1 byte.

What does void * mean?

Using a void * means that the function can take a pointer that doesn’t need to be a specific type. For example, in socket functions, you have send(void * pData, int nLength) this means you can call it in many ways, for example char * data = “blah”; send(data, strlen(data)); POINT p; p.

Can we have 2 main methods in C#?

In a C# application, we can have multiple Main methods but only one of them with valid Main signature can be treated as Startup or Entry Point of the application.

What is private void C#?

this is method private void DoSomething() { …code } this is function private int DoSomething() { ..code return 1 } private means the method, function, or property is not accessible to outside the class but can be invoke inside the class itself.

What type of word is void?

adjective. Law. having no legal force or effect; not legally binding or enforceable.

Is void a data type?

Void is considered a data type (for organizational purposes), but it is basically a keyword to use as a placeholder where you would put a data type, to represent “no data”.

What is void * ptr?

The void pointer, also known as the generic pointer, is a special type of pointer that can be pointed at objects of any data type! A void pointer is declared like a normal pointer, using the void keyword as the pointer’s type: 1. void *ptr; // ptr is a void pointer.

What is namespace C#?

Advertisements. A namespace is designed for providing a way to keep one set of names separate from another. The class names declared in one namespace does not conflict with the same class names declared in another.

What is the use of void pointer?

The void pointer in C is a pointer which is not associated with any data types. It points to some data location in the storage means points to the address of variables. It is also called general purpose pointer. In C, malloc() and calloc() functions return void * or generic pointers.

What is void in C#?

You use void as the return type of a method (or a local function) to specify that the method doesn’t return a value. … You cannot use void as the type of a variable.

Why void is used in C?

void (C++) When used as a function return type, the void keyword specifies that the function does not return a value. When used for a function’s parameter list, void specifies that the function takes no parameters. When used in the declaration of a pointer, void specifies that the pointer is “universal.”