how many N I T college of india which are they?

Hello,
There are 31 NITs in India.
Here is the total list of National Institutes of Technology in India-

National Institute of Technology, Agartala, Tripura

National Institute of Technology, Patna, Bihar

Motilal Nehru National Institute of Technology, Allahabad, Uttar pradesh

Maulana Azad National Institute of Technology, Bhopal, Madhya pradesh

National Institute of Technology, Calicut, Kerala

National Institute of Technology, Durgapur, West Bengal

National Institute of Technology, Hamirpur, Himachal Pradesh

Malaviya National Institute of Technology, Jaipur, Rajasthan

Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab

National Institute of Technology, Jamshedpur, Jharkhand

National Institute of Technology, Kurukshetra, Haryana

Visvesvaraya National Institute of Technology, Maharashtra

National Institute of Technology, Raipur, Chhattisgarh

National Institute of Technology, Rourkela, Odisha

National Institute of Technology, Silchar, Assam

National Institute of Technology, Srinagar, Jammu & Kashmir

S V National Institute of Technology, Surat, Gujarat

National Institute of Technology, Karnataka

National Institute of Technology, Trichy, Tamilnadu

National Institute of Technology, Tadepalligudem, Andhra Pradesh

National Institute of Technology, Warangal, Telangana

National Institute of Technology, Arunachal Pradesh (Yupia)

National Institute of Technology Sikkim

National Institute of Technology, Goa

National Institute of Technology, Meghalaya

National Institute of Technology, Nagaland

National Institute of Technology, Manipur

National Institute of Technology Mizoram

National Institute of Technology Uttarakhand

National Institute of Technology, Delhi

National Institute of Technology, Karaikal, Puducherry