i want to know the difference

[Naisuke]

a=int(input("enter a number:"))
def check_prime_numbers():
    for i in range(2, (a//2+1)):
        if a%i==0  :
            print(f"{a} isn't prime number")
            break
    else:
        print(f"{a} is a prime number")
check_prime_numbers()

my teach send me this code and asked me why did he printed a instead of i
can I get some help?

deanhystad write Jan-23-2024, 04:13 PM:
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[deanhystad]

Do you know what the code does?

[Naisuke]

Do you know what the code does?

it is use to find prime numbers

[deanhystad]

Not really. It checks if a number is prime. A subtle, but important difference. What role does "a" play? Is it the potential prime number, or a potential factor?

The code is poorly written. "a" should be passed as a function argument, not as a global variable. The function should return a value instead of printing a message.