input: Write a python function to generate a list of prime numbers up to 100.
  assert generate_primes()==[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]
  assert generate_primes()[0]==2
  assert len(generate_primes())==25
output: def generate_primes():
      primes = []
      for num in range(2, 101):
          is_prime = True
          for i in range(2, int(num**0.5) + 1):
              if num % i == 0:
                  is_prime = False
                  break
          if is_prime:
              primes.append(num)
      return primes