Question

find prime number and composit number between 1 to 100 using Sieve of Eratosthenes.

Answer 1

2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97  -  are the prime numbers between 100 
  except these numbers remaining numbers are composite.

Answer 2

A prime number is a whole number that is greater than one and has exactly two factors, 1 and itself. A.
prime numbers are 3,5,7,11,13,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89 and 97..
composite number is a whole number that is greater than one and has more than two factors. The number 1 is neither prime nor composite. Number 2 is the only prime even number.