What is Sign Language?

Sign language is utmost frequently used language in deaf community. It is a language which talk with help of hands movements, body parts and facial expression. Indian Sign language is commonly used sign language among deaf people in India. In different parts of India it has different signs but grammar is same throughout the country.Similiarly in different states of India has different languages(for example in Maharashtra Marathi, In Gujrat Gujrati etc.., same way signs language has little difference in contradictory region.