What happens if you dont have any water or food?

I don't have any special sites (Wikipedia helps), but I'll give you an answer based on my experience.

Without water, you become dehydrated and your body seems to go bad. You need water to drink. I heard going fourteen days without any water will cause you to die, but I'm not so sure about this.

I became obsessed with my weight in sixth grade. I decided to feed only on a few Ritz crackers a day. After doing this for a few weeks, it got to the point where I literally couldn't walk. It looked like a baby trying to take their first steps. I kept falling after I found the strength to get up. I was always tired, and then it got to the point where I wasn't hungry at all. I was weak. My doctor said my white blood cell count was very low and that's not good for the immune system (to help fight off infections).

I was hospitalised and now I'm an average weight. There's a lot more things that happen, and Wikipedia will give you some medical states/diseases on dehydration and anorexia nervosa. There's a whole list of things (I just checked).

Try not to go the same route that I did.