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What is void main () into main and what it does?
Asked by Noreen Last Modified
Answer 
Void main () is the entry point for execution in C program. The void is a keyword that represents function will not return anything but a void value.
Main is the name of the function and () represents parameter list that can be passed to function in this case nothing is passed.
Syntax of main function is :
dataType main()
{
// your code here
}
in the above function, dataType is the type of data (int, float or string) return by the main function.
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Rajeev Kumar
I am senior Full Stack developer and corporate trainer with 9 + years of experience in IT Industry.
Suchitra Gandu
Computer Science Engineering - Assistant professor
As we know, C Language is a Procedural language, where the emphasis is on functions or procedures. The main() is a function from where any C Program starts execution and void is a keyword which is used in the place of function's return type which means the function will not return any value at the point of call.
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Hello Noreen,
In simple terms, the void main() is an entry point of c, c++ or Java program.
In C, C++ or Java, the program starts execution from the main function.
Now let's talk about the main part of your questions what is void in void main(). C has statically typed programming language before sending it to the compiler we always need to specify the return type of function. If the function is returning any value which is going to be used in an expression, then you should specify a return type, e.g. int, float, char.
If the function is not returning any value at that time, you must specify void so that compiler won't look for the return value in the function.
If you're using modern compiler like GCC, you need to specify int main so that where you can return 1 or 0 or -1 to the loader.
Also, don't get confused between Null and void. There is a different meaning of null in programming. Null is considered as a value or constant when you want to create a variable you can assign null value, but you can't assign void to any variable.
I hope this will clear your doubt. If not, try to practice on the same and learn from errors.
Happy Coding :)
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