C Programming - Declarations and Initializations - Discussion

Since void is the data type of variable 'v', initialisation of we as 0 (v=0) leads to redeclaration of 'v'.

@All.

Here is my explanation.

The above code will not compile and will give an error.

The reason for the error is that you cannot declare a void variable in C. The void keyword is used to indicate that a function returns no value. In this case, you are trying to declare a void variable, which is not valid.

If you want to declare a variable with an initial value of zero, you can use the following code:

#include <stdio.h>
int main()
{
int v = 0;

printf("%d", v);

return 0;
}

This will declare an integer variable v and initialize it to zero. The printf statement will print the value of v to the console.

In C, the void keyword is used to indicate that a function does not return any value.

It is not a valid data type for variables. In this program, you are trying to declare a variable V of type void, which is not allowed.

A void is not exactly a data type, but when you define any function as a void it means that the function returns nothing/no value.

@All.

Listen to my explanation.
It's simple. We can only use void in function declaration/definition or with a pointer.
For eg:
void display(){} //indicates that the function will not be returning a value
int factorial(void){} //indicates that the function has no parameters
void *ptr; //indicates that the pointer ptr points to nothing

But using void in a normal variable declaration is not valid.
Eg: void sum = 0;