Why do we use int main in C++?

The short answer, is because the C++ standard requires main() to return int . As you probably know, the return value from the main() function is used by the runtime library as the exit code for the process. Both Unix and Win32 support the concept of a (small) integer returned from a process after it has finished.

Why is void used in C++?

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 does void mean in C++?

Why is void used?

What is the purpose of a void method?

Void is a keyword used in many programming languages. In JAVA, void is used when you do not want your function to return anything.

What is the meaning of void main in C++?

Void main is standard signature.Void is return type it means function will not return anything main is reserve/key word it means the execution of program will start from this function Source. Thus, main is the default entry point in the C++ program.

What does it mean when a function is prefixed with void?

When c or c++ compiles it starts with the main function and follows the statements found in it. To the compiler when a function is prefixed with void it means it does not return anything or in other words there is no need to have a return statement at the end of the Function.

Does the main() method have to have a void return type?

The main()method must indeed have a voidreturn type. From the Java Language Specificationon “Execution – Virtual Machine Start-Up” (§12.1.4): The method mainmust be declared public, static, and void. It must accept a single argument that is an array of strings.

Is it OK to use void main in a test?

On other evironments (I can’t do practical tests now), void main (void) is ok, while in this case it raises a warning. The warning is not because of standard alone, but only since in the environment in use the prototype for main does not match. Standard seems to allow any other “configuration” for main.