Program to check whether a given number is prime or not using a while loop in Python:

 # While loop in Python - Checking if a number is prime

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

is_prime = True

i = 2

while i <= num//2:

    if num % i == 0:

        is_prime = False

        break

    i += 1

if is_prime:

    print(num, "is a prime number")

else:

    print(num, "is not a prime number")


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