The for loop 16.3

Question

How do I use a for loop to out put the equivalent of ((N/2)(1+N)) ?

Answer 1

All you need initialize an additional variable and add it with iteration variable for each iteration means inside the loop.

Answer 2

Hi Samuel Whyte
Could you elaborate on your question please.

Call me dumb, but I don't understand

Answer 3

The for loop is good for multiple out puts I’m not sure how to use it for just the one I want. I’ve got:
int N = Convert.ToInt32(Console.ReadLine());

for (int sum =1; sum < N; sum+=sum)

Console.WriteLine(sum);

I want sum = (N/2)(1+N)

Answer 4

Samuel Whyte
I still don't understand ((N/2)(1+N)), but I think you are trying to do this:

int N, i, sum;
N = Convert.ToInt32(Console.ReadLine());

sum = 0;

for(i=0; i<N; i++){
sum += i;
}
Console.WriteLine(sum);

Answer 5

Thank you thats solved my problem