Sabih Hasan - 2 months ago 12

Python Question

so I've written a function which checks if a number is a prime

`def prime_checker(prime):`

limit = int(math.sqrt(prime))

x = 2

while x <= limit:

if prime % x != 0:

x += 1

if x == limit:

print("%d is prime" % prime)

return True

else:

print("%d Not a prime" % prime)

return False

prime_checker(199)

Now I want to create a function which tests numbers with prime_checker method and append this number to a list if it is prime. My attempt for it is:

`def prime_counting():`

list_of_primes = []

for x in range(10):

if prime_checker(x) == True:

list_of_primes.append(x)

print(list_of_primes)

prime_counting()

However, this doesn't work. Is there any way to fix this?

Answer

Your prime checker does not work in some cases. Try

```
def prime_checker(prime):
limit = int(math.sqrt(prime))
for x in range(2, limit + 1):
if prime % x == 0:
return False
return True
```