#include <stdio.h>

int main() {
    int limit,a=1,s=0;
    printf("\nEnter how many natural no you want to sum:\n");
    scanf("%d",&limit);
    while(a<=limit)
    {   printf("\n%5d",a);
        s=s+a;
        a++;
        
    }
    printf("\n Sum of %d natural nos. is %d",limit,s);
    
    return 0;
}