Write a C Program to add first n numbers.

Write a C Program to add first n numbers.

1:  #include<stdio.h>  
2:  #include<conio.h>  
3:  void sum(int);  
4:  int main()  
5:  {  
6:        int n;  
7:        clrscr();  
8:        printf("Enter a number : ");  
9:        scanf("%d",&n);  
10:        sum(n);  
11:        getch();  
12:        return 0;  
13:  }  
14:  void sum(int n)  
15:  {  
16:        int i,s=0;  
17:        for(i=1;i<=n;i++)  
18:        {  
19:              s+=i;  
20:        }  
21:        printf("Sum of first %d integer is %d\n",n,s);  
22:  }