you are teaching a class about basic camera functions like power, basic date/time, menu navigation, and how to properly attach and remove lenses from a DSLR or hybrid camera. While you would likely do a lot more showing than telling while teaching, share a script of what you would say to properly explain how to perform these basic actions.

So, I would start the class off with this, “Camera’s are so crucial to life, why because they capture light and memories that are a once and a lifetime thing.” Then after the students dwelling on that statement, I would start with talking about how to set up a camera. I would pull out mine and pull up a diagram on the green screen and show them step by step what I do. First, you want to turn the camera on by turning the switch where the white line lines up with “on”, once you are, then you want to set up the time and date. To do so, you want to click on the menu button, once you are in, there should be a list of five options, you want to go to the setup menu. Once there you want to click on “World time” there you can change the date and time.  Once you have set up the time you want to go back to the menu screen, there are 5 options. The five options are called “playback menu”, “Shooting menu”, “Custom Setting menu”, “Setup menu” and “retouch menu”. These five have various purposes in which we will get to later on inside of the lesson. Now camera lenses are super easy, when you are changing or taking off lens, there should be a button on the left side of the camera right under your camera model name. Hold that button in with one hand and grab the lens with the other, then you want to twist the lens till it comes off. To put it back on you want to line up the white dots and it should slide in and then twist it back on.  

Explanation: That is the answer

which functions return a valid value without any arguments?

(-blank- and -blank- return a valid value without any arguments.)

1st -blank-

today

sqrt

count

2nd -blank-

round

now

sqrt