[Solved] count prime number in a list

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Here is my fix of your code.

def count_primes_in_list(numbers):
    primes = []

    for num in numbers:
        if num == 2:
            primes.append(num)
        else:
            is_prime = True
            for i in range(2, num):
                if num % i == 0:
                    is_prime = False
                    break

            if is_prime:
                print (num)
                primes.append(num)

    return len(primes)


z = [4, 5, 6, 7, 8, 9, 10]
print (count_primes_in_list(z))

I’ll note a few things for beginners to know. Don’t use reserved or type like words for methods and variables, name things descriptively. Change function to count_primes_in_list, array to primes, x to numbers and so on. Your test for a prime is incorrect. A prime is a number greater than 1 that can not be divided by another number greater than 1 and less than its self. In python don’t put () around if tests.

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solved count prime number in a list