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C language is a middle level language. It is a structured language. C language is a case sensitive language. All syntax written in c language is in lower case. C is the basis for C++.

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Pointers	Structures in C	Strings in C	Command Line Arguments	Type Casting
Linked Lists	Recursion	Binary Trees	Inheritance	Multiple Inheritance
Templates	File I/O	Object Oriented Programming	Data Structures in C	C interview Questions

c void data type

C Data type - void

Actual meaning of void is nothing. Size of void data type is meaningless question.

What will be output of following c code?
#include<stdio.h>
int main(){
int size;
size=sizeof(void);
printf("%d",size);
return 0;
}

Output will be Compilation error

If we will try to find the size of void data type complier will show an error message “not type allowed”.
We cannot use any storage class modifier with void data type so void data type doesn’t reserve any memory space.
Hence we cannot declare any variable as of void type i.e.
void num; //compilation error

Use of void data type

1. To declare generic pointer
2. As a function return type
3. As a function parameter.