How to do print screen in Mac OS X

Yesterday, i wanted to do a print screen in Mac OS X but there is not print screen button in Mac keyboard :p This is the first time i use Mac machine. So i ask one of my friend to teach me how to do screen capture in Mac OS X.
There are few ways to do screen capture in Mac OS X.
Follow the steps below and you will be able to do a screen capture in Mac OS X.

Switch to the screen that you wan to to do screen capture

Hold down Apple key ⌘ + Shift + 3 and release all

then use your mouse to click on the screen
Done. You will see a picture file in at your desktop. That’s the screen capture picture.

You can also do a screen capture for a portion of your screen.

Switch to the screen that you wan to to do screen capture

Hold down Apple key ⌘ + Shift + 4 and release all key

Now, You will see the mouse cursor will change to +
You can start to drag your mouse to select the portion you wish to capture.
Once finish, you will see a picture file in at your desktop. That’s the screen capture picture!

If you want to do a screen capture for a particular application window, you can follow this:-

Switch to the screen that you wan to to do screen capture

Hold down Apple key ⌘ + Shift + 4 and release all key

Now, You will see the mouse cursor will change to +
Press the space bar once
You will see the mouse cursor change to a camera
Now you can use the camera to select which application window to screen capture
Once finish, you will see a picture file in at your desktop. That’s the screen capture picture!

It’s easy to do screen capture in Mac OS X right?
No need to open any program like Paint to paste the copy from clipboard