Take a Screenshot in Mac

I used screenshot quite often. When I first tried to take a screenshot on my Mac. I found that there's no screenshot button on the keyboard. How do I take a screenshot in Mac? Thanks for the internet.  Here you go

• Command-Shift-3: Take a screenshot of the screen, and save it as a file on the desktop
• Command-Shift-4, then select an area: Take a screenshot of an area and save it as a file on the desktop
• Command-Shift-4, then space, then click a window: Take a screenshot of a window and save it as a file on the desktop
• Command-Control-Shift-3: Take a screenshot of the screen, and save it to the clipboard
• Command-Control-Shift-4, then select an area: Take a screenshot of an area and save it to the clipboard
• Command-Control-Shift-4, then space, then click a window: Take a screenshot of a window and save it to the clipboard

Source: MacRumors' Guide