ShreeSanaviAcademy.

#include <stdio.h>
#include<conio.h>
int main()
{
    long n,m,s=0,h=1;
    printf("enter the value");
    scanf("%d",&n);
    for(m=1;m<=n;m++)
    {
        h=h*m;
        s=s+h;
    }
    printf("%ld",s);
    getch();
    return 0;
}

enter the value6
873
--------------------------------
Process exited after 5.11 seconds with return value 0
Press any key to continue . . .