Shortcuts for paragraph styles consist of a number on a numeric keypad and a modifier key (e.g., Ctrl/Cmd or Alt/Option key). If your computer doesn't have a numeric keypad, you may need to use another method like Quick Apply to apply paragraph styles.
Thanks Steve! I am really surprized that I cannot give shortcut using my laptop as I do not have a numpad in it. I am using a Windows OS. Is there no other option other than Quick apply?
Many laptops have a way to simulate numpad entry, such as a "Fn" key combined with little numbers printed on the bottom edge of the keys.
I own a tiny little external USB numpad which works great (when I need to put the numpad on the left-side of the keyboard).
Mac users who also own iPhones can use an app to turn their iPhones into external numpads.
All that being said, I've grown quite accustomed to using Quick Apply. It really is faster. Or, rather, once I developed a naming convention for my styles so that I never needed to whack more than two or three keystrokes in order to apply my desired style, it was much faster than any of the above methods.
It worked as you said with my external keyboard. But I am not interested in using that.
PS: Can you clarify one another doubt I have?