What is a void function?

Void functions are created and used just like value-returning functions except they do not return a value after the function executes. In lieu of a data type, void functions use the keyword “void.” A void function performs a task, and then control returns back to the caller–but, it does not return a value.

What are the uses of void type?

The void type, in several programming languages derived from C and Algol68, is the type for the result of a function that returns normally, but does not provide a result value to its caller. Usually such functions are called for their side effects, such as performing some task or writing to their output parameters.

What is void function in Python?

In Python, it is possible to compose a function without a return statement. Functions like this are called void, and they return None, Python’s special object for “nothing”. Here’s an example of a void function: Calling the two functions, you first notice the slight difference in the output.

What is the use of void in C language?

Void is an empty data type that has no value. We use void data type in functions when we don’t want to return any value to the calling function. Example: void sum (int a, int b); – This function won’t return any value to the calling function.

Do void functions need a return statement?

Any method declared void doesn’t return a value. It does not need to contain a return statement, but it may do so. The data type of the return value must match the method’s declared return type; you can’t return an integer value from a method declared to return a boolean.

Is void a keyword?

void is a keyword, it is a reference type of data type and used to specify the return type of a method in C#.

What is the importance of void data type?

The void data type is typically used in the definition and prototyping of functions to indicate that either nothing is being passed in and/or nothing is being returned.

What is void and non void function explain with a suitable example?

Such functions which do not have a return statement in them are called void functions. Void functions are those that do not return anything. ”None” is a special type in Python, which is returned after a void function ends. kaypeeoh72z and 3 more users found this answer helpful. Thanks 2.

Is void a keyword in C?

void. The void keyword meaning nothing or no value. Here, the testFunction() function cannot return a value because its return type is void.

Is void 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”.

Can void function return values?

A void function cannot return any values.

What is the use of void keyword in 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.”. If a pointer’s type is void *,…

What is voidvoid function 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.

What does it mean when a function returns a void value?

Updated April 28, 2019. In computer programming, when void is used as a function return type, it indicates that the function does not return a value. When void appears in a pointer declaration, it specifies that the pointer is universal. When used in a function’s parameter list, void indicates that the function takes no parameters.

What is the use of void in Computer Science?

Computer Science. In computer programming, when void is used as a function return type, it indicates that the function does not return a value. When void appears in a pointer declaration, it specifies that the pointer is universal. When used in a function’s parameter list, void indicates that the function takes no parameters.