C program to Find Sum of all Numbers b/w 1 to n Using For Loop

Q:- Write a C program to Find Sum of all Numbers b/w 1 to n Using For Loop ?

      Input

        #include<stdio.h>

        #include<conio.h>

        main()

   {

int num,i,s=0;

clrscr();

printf(“Enter a Limit of N=”);

scanf(“%d”,&num);

for(i=1;i<=num;i++)

{

s=s+i;

}

printf(“Sum of all Natural Numbers = %d”,s);

getch();   

}

Output

Enter a Limit of N = 5

Sum of all Natural Numbers = 15