Write a program to find the sum of first n natural numbers

#include<stdio.h>

#include<conio.h>

void main()

{

int n,sum=0,i=1;

clrscr();

printf("Enter the number: ");

scanf("%d",&n);

while(i<=n)

{

sum=sum+i;

i++;

}

printf("Sum=%d",sum);

getch();

}

Output:

Enter the number: 5

Sum=15