该代码是否正确以检查数字是否为质数？

更正您的代码，

user_number = int(input("Enter a number: "))
a = list(range(2, user_number))
def prime(x):
    isPrime = True # Assumne that the number is prime
    for e in a:
        if user_number % e == 0: # If divisible, it's not a prime number
            isPrime = False
            break
    if isPrime:
        print(str(user_number) + " is a prime number.") # Not divisible by any number in range [2,user_number), i.e. a prime number
    else:
        print(str(user_number) + " is not a prime number.")

prime(user_number)