Bharath, you seem to be asking quite a lot of basic questions. Have you completed the tutorials provided within the SW software? start with the first one and continue through for a thorough grounding in the basic functions.
If you're working and are learning SW for a job, request getting sent on the essentials training course. You'll find it invaluable. Once you've done the essentials and worked tirelessly within SW for 12months or so request doing any number of advanced courses specific to your field.