Home » C programs » C user-defined functions programs

C - User define function example with no argument and no return type

User define function Example with No argument and No return type - In this C program, we are defining a function that will not have any argument and return type.
Submitted by IncludeHelp, on April 18, 2018

Define a function with no argument and no return type in C language.

In the program, we have function named fun1 which has no argument and no return type (void is the return type - that means, function will not return anything).

Within the function fun1 we are declaring an array, calculating sum of its elements and printing the sum.

Program

/*  
User define function example with no argument 
and no return type 
*/

#include <stdio.h>


void fun1(void)
{
  int array[10]={1,2,3,4,5,6};
  int i=0,sum=0;
  
  for(i=0;i<6;i++)
  {
      sum = sum + array[i];
  }
  
  printf("\nThe sum of all array elements is : %d",sum);
}

// main function
int main()
{
  //calling the function
  fun1();
  
  return 0;
}

Output

The sum of all array elements is : 21