Question

the sun is star or not a star?

Answer 1

The sun is star as it has its own light. Sun like other stars is a ball of hydrogen and helium gases and produces energy by nuclear fusion

Answer 2

Yes, the sun is a star. Because it is a huge ball of burning fire which emits huge amounts of heat and light continuously. It is the star closer to the Earth. The sun is a very bright star as compared to other stars that are very faint. Hence we can see the sun at day.
Hope this helps!