Aperture and IOS photography

I have taken some Aperture and IOS pictures.  Aperture affects the amount of light that you let in. if the hole is big that means that it will be lighter. You should use this if you are in a dark place. If the hole is small that means that the amount of light coming in is small percent you would use this if you are outside in a really light place. i have learned that the bigger the hole the smaller the number is, when you are using the camera. I also learned that you can change the depth of focus. When you look at the camera and you see that is has F3.5 this shows that the foreground is in focus all you can see is what is up close to the camera for instants the handcuffs up above.. F9, this is where things are a little but more in to focus now, so you can see the handcuffs and the person, but not the background and F22 you are gradually getting more into to focus the higher up the number scale that you go. by the time that you get to F33 everything is in focus and is clear