Question

In C language, when to use the void function? how to use it? Can you give me some examples.

I just need to understand it. Thanks!

Answer 1

when to use void function:
When u don't want a function to return anything then use void function
Example
#include<stdio.h>
void function(int a,int b)
{
int x=a+b;
printf("The value of x is ");
printf("%d",x);
}
int main()
{
int x=10,y=20;
function(10,20);
}

Answer 2

#include<stdio.h>
int function(int a,int b)
{
int x=a+b;
return x;
}
int main()
{
int x=10,y=20;
b=function(10,20);
printf("The value of b is");
printf("%d",b);
}
output of this program is- the value of b is 30
In this program function is returning the value of x to main function
When ever u dont want function to return anything then use void function

Answer 3

Please feel free to contact if u have any doubt

Answer 4

you make a function void if it doesnt have to return any values.

Answer 5

you can use 'return' values from functions to return values computed or looked-up from the function, or to report error/success states, etc.

"Void" means "nothing" and is used when you don't need your function to return anything.

Answer 6

oh okay! thank you guys! :)

Answer 7

Just a little tidbit: A lot of functions with no return are actually boolean types. They may simply return true if they succeed and false if they fail. So void is used a lot less than you might think.

Answer 8

thanks for that additional input :)