n = 20
primes = []
for i in range(2, n + 1):
for j in range(2, int(i ** 0.5) + 1):
if i%j == 0:
break
else:
primes.append(i)
print(primes)import math
def isPrimeNumber(n):
if (n < 2):
return False;
sq = int(math.sqrt(n))
for i in range(2, sq + 1):
if (n % i == 0):
return False
return Truea=int(input('print number:'))
for i in range(2,a):
if a%i !=0:
continue
else:
print("Its not a prime number")
break # here break is exicuted then it means else would not be exicuted.
else:
print("Its a prime number")def is_prime(n):
for i in range(2,n):
if (n%i) == 0:
return False
return Trueimport math
def main():
count = 3
while True:
isprime = True
for x in range(2, int(math.sqrt(count) + 1)):
if count % x == 0:
isprime = False
break
if isprime:
print count
count += 1