nums = [2, 3, 4, 5, 6]

for num in nums:
    if num > 1:
        for i in range(2, num):
            if num % i == 0:
                break
        else:
            print(num, "is prime")

2 is prime
3 is prime
5 is prime

text = input("Enter sentence: ")
words = text.split()

longest = max(words, key=len)
print("Longest word:", longest)

Enter sentence:  54


Longest word: 54

username = "admin"
password = "1234"

u = input("Enter username: ")
p = input("Enter password: ")

if u == username and p == password:
    print("Login successful")
else:
    print("Invalid credentials")

Enter username:  ramu
Enter password:  1234


Invalid credentials