Write a Python program that takes a number as input and checks if it is NOT a prime number.

 

num = int(input("Enter a number: "))

if num < 2 or any(num % i == 0 for i in range(2, int(num ** 0.5) + 1)):

    print("The number is NOT a prime number.")

else:

    print("The number is a prime number.")

#source code --> clcoding.com 

Code Explanation:

Taking User Input

num = int(input("Enter a number: "))

The user is asked to enter a number.

Since input() returns a string, we convert it to an integer using int().

Checking if the Number is NOT Prime

if num < 2 or any(num % i == 0 for i in range(2, int(num ** 0.5) + 1)):

Step 1: Check if the number is less than 2

Any number less than 2 is NOT prime (e.g., 0 and 1 are not prime).

Step 2: Check if the number is divisible by any number from 2 to √num

We loop from 2 to √num (int(num ** 0.5) + 1) because if a number is divisible by any number in this range, it is NOT prime.

any(num % i == 0 for i in range(2, int(num ** 0.5) + 1)) checks if num is divisible by any i in this range.

Step 3: If either condition is True, print "The number is NOT a prime number."

Printing the Result

    print("The number is NOT a prime number.")

If the number is divisible by any number other than 1 and itself, it is NOT prime.

else:

    print("The number is a prime number.")

If the number passes all conditions, it is prime.